Asia
✓ Prices checked Sep 30, 2026
Best eSIM for Japan in 2026
Every prepaid eSIM plan for Japan from every major provider, ranked by the same formulas — $/GB, $/day and fair-use fine print decoded.
Quick verdict
Which Japan eSIM is best for your trip?
The best Japan eSIM depends on how you travel. Three picks computed from all 177 plans we track — prices checked Sep 30, 2026.
The full database
All Japan eSIM plans compared
| Provider | Plan | Data | Validity | Price | $/day | $/GB | Network | Link |
|---|---|---|---|---|---|---|---|---|
aloSIM
Best value
|
50GB / 10 Days | 50GB | 10 days | $27.50 | $2.75 | $0.55 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
50GB / 15 Days | 50GB | 15 days | $30.00 | $2.00 | $0.60 | NTT Docomo, SoftBank, KDDI | View plan |
Roamic
|
Japan eSIM 50GB / 30 Days | 50GB | 30 days | $33.00 | $1.10 | $0.66 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
50GB / 30 Days | 50GB | 30 days | $34.50 | $1.15 | $0.69 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM 20GB / 30 Days | 20GB | 30 days | $15.00 | $0.50 | $0.75 | NTT Docomo, SoftBank, KDDI | View plan |
Roami
|
50GB / 30 Days | 50GB | 30 days | $37.99 | $1.27 | $0.76 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
20GB / 7 Days | 20GB | 7 days | $16.99 | $2.43 | $0.85 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
30GB / 15 Days | 30GB | 15 days | $25.99 | $1.73 | $0.87 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
30GB / 30 Days | 30GB | 30 days | $25.99 | $0.87 | $0.87 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
10GB / 3 Days | 10GB | 3 days | $8.99 | $3.00 | $0.90 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
20GB / 15 Days | 20GB | 15 days | $17.99 | $1.20 | $0.90 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM 10GB / 30 Days | 10GB | 30 days | $9.00 | $0.30 | $0.90 | NTT Docomo, SoftBank, KDDI | View plan |
Ubigi
|
20GB / 30 Days | 20GB | 30 days | $18.00 | $0.60 | $0.90 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
Most data
|
60GB / 365 Days | 60GB | 365 days | $55.00 | $0.15 | $0.92 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
3GB / 3 Days | 3GB | 3 days | $2.99 | $1.00 | $1.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
10GB / 7 Days | 10GB | 7 days | $9.99 | $1.43 | $1.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM 3GB / 14 Days | 3GB | 14 days | $3.00 | $0.21 | $1.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM 5GB / 21 Days | 5GB | 21 days | $5.00 | $0.24 | $1.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
20GB / 30 Days | 20GB | 30 days | $20.99 | $0.70 | $1.05 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
Most data
|
60GB / 30 Days | 60GB | 30 days | $65.00 | $2.17 | $1.08 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
10GB / 15 Days | 10GB | 15 days | $10.99 | $0.73 | $1.10 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
20GB / 7 Days | 20GB | 7 days | $22.00 | $3.14 | $1.10 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
50GB / 30 Days | 50GB | 30 days | $55.00 | $1.83 | $1.10 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
20GB / 10 Days | 20GB | 10 days | $23.00 | $2.30 | $1.15 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
5GB / 3 Days | 5GB | 3 days | $5.99 | $2.00 | $1.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
5GB / 7 Days | 5GB | 7 days | $5.99 | $0.86 | $1.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
10GB / 30 Days | 10GB | 30 days | $11.99 | $0.40 | $1.20 | NTT Docomo, SoftBank, KDDI | View plan |
Airalo
|
Moshi Moshi - 20 GB | 20GB | 15 days | $24.00 | $1.60 | $1.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
20GB / 15 Days | 20GB | 15 days | $24.00 | $1.60 | $1.20 | NTT Docomo, SoftBank, KDDI | View plan |
Yesim
|
30GB / 30 Days | 30GB | 30 days | $37.42 | $1.25 | $1.25 | NTT Docomo, SoftBank, KDDI | View plan |
Saily
|
Japan 20GB 30 days | 20GB | 30 days | $24.99 | $0.83 | $1.25 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 20 GB | 20GB | 30 days | $25.00 | $0.83 | $1.25 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
20GB / 30 Days | 20GB | 30 days | $25.00 | $0.83 | $1.25 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
25GB / 30 Days | 25GB | 30 days | $32.00 | $1.07 | $1.28 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
30GB / 15 Days | 30GB | 15 days | $39.00 | $2.60 | $1.30 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
3GB / 7 Days | 3GB | 7 days | $3.99 | $0.57 | $1.33 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
5GB / 15 Days | 5GB | 15 days | $6.99 | $0.47 | $1.40 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 3 Days | 5GB | 3 days | $7.00 | $2.33 | $1.40 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 5 Days | 5GB | 5 days | $7.00 | $1.40 | $1.40 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
10GB / 7 Days | 10GB | 7 days | $14.00 | $2.00 | $1.40 | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
20GB / 30 Days | 20GB | 30 days | $28.12 | $0.94 | $1.41 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
3GB / 1 Day | 3GB | 1 days | $4.50 | $4.50 | $1.50 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
10GB / 5 Days | 10GB | 5 days | $15.00 | $3.00 | $1.50 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
5GB / 30 Days | 5GB | 30 days | $7.99 | $0.27 | $1.60 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
5GB / 30 Days | 5GB | 30 days | $8.00 | $0.27 | $1.60 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
10GB / 30 Days | 10GB | 30 days | $16.50 | $0.55 | $1.65 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
3GB / 15 Days | 3GB | 15 days | $4.99 | $0.33 | $1.66 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
3GB / 1 Day | 3GB | 1 days | $5.00 | $5.00 | $1.67 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 10 GB | 10GB | 7 days | $17.00 | $2.43 | $1.70 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
10GB / 7 Days | 10GB | 7 days | $17.00 | $2.43 | $1.70 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 10 GB | 10GB | 15 days | $17.50 | $1.17 | $1.75 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
10GB / 10 Days | 10GB | 10 days | $17.50 | $1.75 | $1.75 | NTT Docomo, SoftBank, KDDI | View plan |
|
Saily
|
Japan 10GB 30 days | 10GB | 30 days | $17.99 | $0.60 | $1.80 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 10 GB | 10GB | 30 days | $18.00 | $0.60 | $1.80 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
10GB / 30 Days | 10GB | 30 days | $18.00 | $0.60 | $1.80 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
10GB / 15 Days | 10GB | 15 days | $18.00 | $1.20 | $1.80 | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
10GB / 30 Days | 10GB | 30 days | $18.14 | $0.60 | $1.81 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 7 Days | 5GB | 7 days | $9.50 | $1.36 | $1.90 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
Cheapest
|
1GB / 3 Days | 1GB | 3 days | $1.99 | $0.66 | $1.99 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
Cheapest
|
1GB / 7 Days | 1GB | 7 days | $1.99 | $0.28 | $1.99 | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
5GB / 30 Days | 5GB | 30 days | $9.98 | $0.33 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
3GB / 30 Days | 3GB | 30 days | $5.99 | $0.20 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 5 GB | 5GB | 7 days | $10.00 | $1.43 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 10 Days | 5GB | 10 days | $10.00 | $1.00 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM 1GB / 7 Days | 1GB | 7 days | $2.00 | $0.29 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
5GB / 15 Days | 5GB | 15 days | $10.00 | $0.67 | $2.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 5 GB | 5GB | 15 days | $10.50 | $0.70 | $2.10 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 15 Days | 5GB | 15 days | $10.50 | $0.70 | $2.10 | NTT Docomo, SoftBank, KDDI | View plan |
|
Saily
|
Japan 5GB 30 days | 5GB | 30 days | $10.99 | $0.37 | $2.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 5 GB | 5GB | 30 days | $11.00 | $0.37 | $2.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
5GB / 30 Days | 5GB | 30 days | $11.00 | $0.37 | $2.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 3 GB | 3GB | 3 days | $7.50 | $2.50 | $2.50 | NTT Docomo, SoftBank, KDDI | View plan |
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Ubigi
|
3GB / 15 Days | 3GB | 15 days | $7.50 | $0.50 | $2.50 | NTT Docomo, SoftBank, KDDI | View plan |
|
Saily
|
Japan 3GB 30 days | 3GB | 30 days | $7.99 | $0.27 | $2.66 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 3 GB | 3GB | 7 days | $8.00 | $1.14 | $2.67 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
3GB / 30 Days | 3GB | 30 days | $8.00 | $0.27 | $2.67 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
2GB / 15 Days | 2GB | 15 days | $6.50 | $0.43 | $3.25 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
1GB / 1 Day | 1GB | 1 days | $3.50 | $3.50 | $3.50 | NTT Docomo, SoftBank, KDDI | View plan |
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Ubigi
|
1GB / 3 Days | 1GB | 3 days | $3.50 | $1.17 | $3.50 | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan 1GB 7 days | 1GB | 7 days | $3.99 | $0.57 | $3.99 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - 1 GB | 1GB | 3 days | $4.00 | $1.33 | $4.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
1GB / 3 Days | 1GB | 3 days | $4.00 | $1.33 | $4.00 | NTT Docomo, SoftBank, KDDI | View plan |
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Ubigi
|
1GB / 30 Days | 1GB | 30 days | $4.00 | $0.13 | $4.00 | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
1GB / 30 Days | 1GB | 30 days | $4.20 | $0.14 | $4.20 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
1GB / 7 Days | 1GB | 7 days | $4.50 | $0.64 | $4.50 | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
1GB / 5 Days | 1GB | 5 days | $4.50 | $0.90 | $4.50 | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - Unlimited | Unlimited | 3 days | $11.50 | $3.83 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - Unlimited | Unlimited | 5 days | $17.00 | $3.40 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - Unlimited | Unlimited | 7 days | $26.50 | $3.79 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - Unlimited | Unlimited | 10 days | $34.50 | $3.45 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Airalo
|
Moshi Moshi - Unlimited | Unlimited | 15 days | $48.00 | $3.20 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Airalo
|
Moshi Moshi - Unlimited | Unlimited | 30 days | $69.00 | $2.30 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 3 Days | Unlimited | 3 days | $11.50 | $3.83 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 5 Days | Unlimited | 5 days | $19.50 | $3.90 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 7 Days | Unlimited | 7 days | $27.00 | $3.86 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 10 Days | Unlimited | 10 days | $35.00 | $3.50 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 15 Days | Unlimited | 15 days | $49.00 | $3.27 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
aloSIM
|
Unlimited / 30 Days | Unlimited | 30 days | $74.00 | $2.47 | — | NTT Docomo, SoftBank, KDDI | View plan |
Holafly
|
Unlimited / 3 Days | Unlimited | 3 days | $11.90 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Holafly
|
Unlimited / 5 Days | Unlimited | 5 days | $20.50 | $4.10 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Holafly
|
Unlimited / 7 Days | Unlimited | 7 days | $27.50 | $3.93 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Holafly
|
Unlimited / 10 Days | Unlimited | 10 days | $36.50 | $3.65 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Holafly
|
Unlimited / 15 Days | Unlimited | 15 days | $50.50 | $3.37 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Holafly
|
Unlimited / 30 Days | Unlimited | 30 days | $73.90 | $2.46 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
Unlimited / 3 Days | Unlimited | 3 days | $9.99 | $3.33 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Roami
|
Unlimited / 7 Days | Unlimited | 7 days | $18.99 | $2.71 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
Unlimited / 15 Days | Unlimited | 15 days | $42.99 | $2.87 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roami
|
Unlimited / 30 Days | Unlimited | 30 days | $71.99 | $2.40 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 1 Day | Unlimited | 1 days | $3.00 | $3.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 2 Days | Unlimited | 2 days | $6.00 | $3.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 3 Days | Unlimited | 3 days | $9.00 | $3.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 4 Days | Unlimited | 4 days | $11.00 | $2.75 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 5 Days | Unlimited | 5 days | $14.00 | $2.80 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 6 Days | Unlimited | 6 days | $16.00 | $2.67 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 7 Days | Unlimited | 7 days | $18.00 | $2.57 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 8 Days | Unlimited | 8 days | $19.00 | $2.38 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 9 Days | Unlimited | 9 days | $22.00 | $2.44 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 10 Days | Unlimited | 10 days | $23.00 | $2.30 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 11 Days | Unlimited | 11 days | $25.00 | $2.27 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 12 Days | Unlimited | 12 days | $27.00 | $2.25 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 13 Days | Unlimited | 13 days | $29.00 | $2.23 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 14 Days | Unlimited | 14 days | $30.00 | $2.14 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 16 Days | Unlimited | 16 days | $32.00 | $2.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 15 Days | Unlimited | 15 days | $32.00 | $2.13 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 17 Days | Unlimited | 17 days | $34.00 | $2.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 18 Days | Unlimited | 18 days | $35.00 | $1.94 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 19 Days | Unlimited | 19 days | $36.00 | $1.89 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 20 Days | Unlimited | 20 days | $37.00 | $1.85 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 21 Days | Unlimited | 21 days | $39.00 | $1.86 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 23 Days | Unlimited | 23 days | $40.00 | $1.74 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 22 Days | Unlimited | 22 days | $40.00 | $1.82 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 24 Days | Unlimited | 24 days | $41.00 | $1.71 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 26 Days | Unlimited | 26 days | $42.00 | $1.62 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Roamic
|
Japan eSIM Unlimited Data / 25 Days | Unlimited | 25 days | $42.00 | $1.68 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Roamic
|
Japan eSIM Unlimited Data / 27 Days | Unlimited | 27 days | $43.00 | $1.59 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 28 Days | Unlimited | 28 days | $44.00 | $1.57 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 29 Days | Unlimited | 29 days | $45.00 | $1.55 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Roamic
|
Japan eSIM Unlimited Data / 30 Days | Unlimited | 30 days | $46.00 | $1.53 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Saily
|
Japan UNLIMITED 5 days | Unlimited | 5 days | $18.99 | $3.80 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Saily
|
Japan UNLIMITED 7 days | Unlimited | 7 days | $28.99 | $4.14 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan UNLIMITED 10 days | Unlimited | 10 days | $34.99 | $3.50 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan UNLIMITED 15 days | Unlimited | 15 days | $48.99 | $3.27 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan UNLIMITED 20 days | Unlimited | 20 days | $59.99 | $3.00 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan UNLIMITED 25 days | Unlimited | 25 days | $65.99 | $2.64 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Saily
|
Japan UNLIMITED 30 days | Unlimited | 30 days | $71.99 | $2.40 | — | NTT Docomo, SoftBank, KDDI | View plan |
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Ubigi
|
Unlimited / 8 Days | Unlimited | 8 days | $25.00 | $3.12 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Ubigi
|
Unlimited / 30 Days | Unlimited | 30 days | $45.00 | $1.50 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 1 Day | Unlimited | 1 days | $3.97 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 2 Days | Unlimited | 2 days | $7.94 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 3 Days | Unlimited | 3 days | $11.91 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 4 Days | Unlimited | 4 days | $15.88 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 5 Days | Unlimited | 5 days | $19.85 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 6 Days | Unlimited | 6 days | $23.82 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 7 Days | Unlimited | 7 days | $27.78 | $3.97 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 8 Days | Unlimited | 8 days | $29.42 | $3.68 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 9 Days | Unlimited | 9 days | $31.05 | $3.45 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 10 Days | Unlimited | 10 days | $32.67 | $3.27 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 11 Days | Unlimited | 11 days | $34.31 | $3.12 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 12 Days | Unlimited | 12 days | $35.94 | $2.99 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 13 Days | Unlimited | 13 days | $37.57 | $2.89 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 14 Days | Unlimited | 14 days | $39.19 | $2.80 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 15 Days | Unlimited | 15 days | $40.83 | $2.72 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 16 Days | Unlimited | 16 days | $42.27 | $2.64 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 17 Days | Unlimited | 17 days | $43.70 | $2.57 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 18 Days | Unlimited | 18 days | $45.14 | $2.51 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 19 Days | Unlimited | 19 days | $46.58 | $2.45 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 20 Days | Unlimited | 20 days | $48.00 | $2.40 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 21 Days | Unlimited | 21 days | $49.44 | $2.35 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 22 Days | Unlimited | 22 days | $50.89 | $2.31 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 23 Days | Unlimited | 23 days | $52.31 | $2.27 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 24 Days | Unlimited | 24 days | $53.75 | $2.24 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 25 Days | Unlimited | 25 days | $55.19 | $2.21 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 26 Days | Unlimited | 26 days | $56.62 | $2.18 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 27 Days | Unlimited | 27 days | $58.06 | $2.15 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 28 Days | Unlimited | 28 days | $59.50 | $2.12 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 29 Days | Unlimited | 29 days | $60.93 | $2.10 | — | NTT Docomo, SoftBank, KDDI | View plan |
|
Yesim
|
Unlimited / 30 Days | Unlimited | 30 days | $62.37 | $2.08 | — | NTT Docomo, SoftBank, KDDI | View plan |
Prices in USD as listed by each provider, excluding promo codes and taxes. Badges are literal sort positions, not editorial picks — see our methodology.
What the numbers mean
What Japan eSIM prices reveal
The raw table hides a split in how Japan eSIMs are priced, and understanding it saves real money. One camp sells fixed data buckets - pay $4-8 for a few gigabytes that expire with the validity window. The other camp, led by Holafly, sells unlimited data billed by the day at roughly $3.90 per day flat. Below about 5GB of expected usage, fixed buckets win easily. Past 15GB, the daily plans start to look reasonable - but only if you check their fair-use fine print first, because “unlimited” almost never means unlimited speed.
The crossover for Japan sits lower than most travelers expect. Roami’s 20GB/30-day plan works out to $1.05 per GB, and its 7-day unlimited tier at $18.99 undercuts Holafly’s equivalent window by about $8 while listing no documented fair-use cap. Unless you specifically want pay-per-day simplicity, the cheapest Japanese data on the market right now is a fixed bucket from Roami or Saily, not an unlimited plan from anyone.
Two Japan-specific rules shape the market here and are worth knowing before you buy. First, local prepaid SIMs legally require passport verification and SoftBank’s own activation desk keeps 9:00-21:00 JST hours - travel eSIMs sidestep both, which is why late-night arrivals at Narita and Haneda should never bet on a local SIM. Second, network matters more than price in rural Japan: plans that ride only Docomo are fine almost everywhere, but multi-network plans that auto-switch between Docomo, SoftBank and KDDI give you fallback signal in onsen towns and along Shinkansen corridors where a single network can drop.
Fine print decoded
Is unlimited eSIM data really unlimited in Japan?
Every "unlimited" plan on this page, with its fair-use policy decoded:
| Provider | Plan | Price | $/day | Fair-use policy |
|---|---|---|---|---|
|
Roamic
|
Japan eSIM Unlimited Data / 1 Day | $3.00 | $3.00 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 1 Day | $3.97 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 2 Days | $6.00 | $3.00 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 2 Days | $7.94 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 3 Days | $9.00 | $3.00 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roami
|
Unlimited / 3 Days | $9.99 | $3.33 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 4 Days | $11.00 | $2.75 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Airalo
|
Moshi Moshi - Unlimited | $11.50 | $3.83 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
aloSIM
|
Unlimited / 3 Days | $11.50 | $3.83 | 3 GB per day at full speed, then ∞ at 1kbps |
|
Holafly
|
Unlimited / 3 Days | $11.90 | $3.97 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
Yesim
|
Unlimited / 3 Days | $11.91 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 5 Days | $14.00 | $2.80 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 4 Days | $15.88 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 6 Days | $16.00 | $2.67 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Airalo
|
Moshi Moshi - Unlimited | $17.00 | $3.40 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 7 Days | $18.00 | $2.57 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roami
|
Unlimited / 7 Days | $18.99 | $2.71 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 5 days | $18.99 | $3.80 | 5 GB per day at full speed, then ∞ at 1kbps |
|
Roamic
|
Japan eSIM Unlimited Data / 8 Days | $19.00 | $2.38 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
aloSIM
|
Unlimited / 5 Days | $19.50 | $3.90 | 3 GB per day at full speed, then ∞ at 1kbps |
|
Yesim
|
Unlimited / 5 Days | $19.85 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Holafly
|
Unlimited / 5 Days | $20.50 | $4.10 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
Roamic
|
Japan eSIM Unlimited Data / 9 Days | $22.00 | $2.44 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 10 Days | $23.00 | $2.30 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 6 Days | $23.82 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 11 Days | $25.00 | $2.27 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Ubigi
|
Unlimited / 8 Days | $25.00 | $3.12 | 5 GB per day at full speed, then ∞ at 2Mbps |
|
Airalo
|
Moshi Moshi - Unlimited | $26.50 | $3.79 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
aloSIM
|
Unlimited / 7 Days | $27.00 | $3.86 | 3 GB per day at full speed, then ∞ at 1kbps |
|
Roamic
|
Japan eSIM Unlimited Data / 12 Days | $27.00 | $2.25 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Holafly
|
Unlimited / 7 Days | $27.50 | $3.93 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
Yesim
|
Unlimited / 7 Days | $27.78 | $3.97 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 7 days | $28.99 | $4.14 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 13 Days | $29.00 | $2.23 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 8 Days | $29.42 | $3.68 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 14 Days | $30.00 | $2.14 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 9 Days | $31.05 | $3.45 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 16 Days | $32.00 | $2.00 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 15 Days | $32.00 | $2.13 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 10 Days | $32.67 | $3.27 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 17 Days | $34.00 | $2.00 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 11 Days | $34.31 | $3.12 | No fair-use policy published — treat speed claims with caution |
|
Airalo
|
Moshi Moshi - Unlimited | $34.50 | $3.45 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Saily
|
Japan UNLIMITED 10 days | $34.99 | $3.50 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
aloSIM
|
Unlimited / 10 Days | $35.00 | $3.50 | 3 GB per day at full speed, then ∞ at 1kbps |
|
Roamic
|
Japan eSIM Unlimited Data / 18 Days | $35.00 | $1.94 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 12 Days | $35.94 | $2.99 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 19 Days | $36.00 | $1.89 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Holafly
|
Unlimited / 10 Days | $36.50 | $3.65 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
Roamic
|
Japan eSIM Unlimited Data / 20 Days | $37.00 | $1.85 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 13 Days | $37.57 | $2.89 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 21 Days | $39.00 | $1.86 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 14 Days | $39.19 | $2.80 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 23 Days | $40.00 | $1.74 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 22 Days | $40.00 | $1.82 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 15 Days | $40.83 | $2.72 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 24 Days | $41.00 | $1.71 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 26 Days | $42.00 | $1.62 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 25 Days | $42.00 | $1.68 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 16 Days | $42.27 | $2.64 | No fair-use policy published — treat speed claims with caution |
|
Roami
|
Unlimited / 15 Days | $42.99 | $2.87 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 27 Days | $43.00 | $1.59 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 17 Days | $43.70 | $2.57 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 28 Days | $44.00 | $1.57 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roamic
|
Japan eSIM Unlimited Data / 29 Days | $45.00 | $1.55 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Ubigi
|
Unlimited / 30 Days | $45.00 | $1.50 | 60 GB per month at full speed, then ∞ at 2Mbps (auto-renewing monthly subscription) |
|
Yesim
|
Unlimited / 18 Days | $45.14 | $2.51 | No fair-use policy published — treat speed claims with caution |
|
Roamic
|
Japan eSIM Unlimited Data / 30 Days | $46.00 | $1.53 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 19 Days | $46.58 | $2.45 | No fair-use policy published — treat speed claims with caution |
|
Airalo
|
Moshi Moshi - Unlimited | $48.00 | $3.20 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 20 Days | $48.00 | $2.40 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 15 days | $48.99 | $3.27 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
aloSIM
|
Unlimited / 15 Days | $49.00 | $3.27 | 3 GB per day at full speed, then ∞ at 1kbps |
|
Yesim
|
Unlimited / 21 Days | $49.44 | $2.35 | No fair-use policy published — treat speed claims with caution |
|
Holafly
|
Unlimited / 15 Days | $50.50 | $3.37 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
Yesim
|
Unlimited / 22 Days | $50.89 | $2.31 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 23 Days | $52.31 | $2.27 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 24 Days | $53.75 | $2.24 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 25 Days | $55.19 | $2.21 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 26 Days | $56.62 | $2.18 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 27 Days | $58.06 | $2.15 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 28 Days | $59.50 | $2.12 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 20 days | $59.99 | $3.00 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
Yesim
|
Unlimited / 29 Days | $60.93 | $2.10 | No fair-use policy published — treat speed claims with caution |
|
Yesim
|
Unlimited / 30 Days | $62.37 | $2.08 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 25 days | $65.99 | $2.64 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
Airalo
|
Moshi Moshi - Unlimited | $69.00 | $2.30 | 3 GB per day at full speed, then ∞ at 1Mbps |
|
Roami
|
Unlimited / 30 Days | $71.99 | $2.40 | No fair-use policy published — treat speed claims with caution |
|
Saily
|
Japan UNLIMITED 30 days | $71.99 | $2.40 | 5 GB per day at full speed, then ∞ at 1Mbps |
|
Holafly
|
Unlimited / 30 Days | $73.90 | $2.46 | Always On backup plan: 1GB of data monthly to keep you connected no matter what. |
|
aloSIM
|
Unlimited / 30 Days | $74.00 | $2.47 | 3 GB per day at full speed, then ∞ at 1kbps |
Decision guide
How to choose your Japan eSIM
How much eSIM data do you need in Japan?
- 1GBMaps, messaging and email for a city break — 1GB / 3 Days starts at $1.99.
- 5GBA normal week of maps, mail and social — cheapest 5GB+ bucket: Japan eSIM 5GB / 21 Days at $5.00.
- 10GB+Streaming, hotspot sharing or a working trip — cheapest 10GB+ bucket: 10GB / 3 Days at $8.99.
- ∞Don't want to count? 91 unlimited plans cover Japan — read the fair-use caps above before picking one.
Want exact numbers for your trip? Try the eSIM trip cost calculator.
How to install your Japan eSIM
- 1Buy before you fly. Plans are delivered instantly — by email (marketplace providers) or in-app (app-based providers like Roami and Saily).
- 2Install on Wi-Fi. Scan the QR code or tap the in-app install button; the eSIM profile downloads in seconds.
- 3Land and it just works. The eSIM connects to its host network in Japan automatically — keep data roaming ON for the eSIM line.
Works on eSIM-capable phones (iPhone XS and newer, most 2019+ Android flagships). Your physical SIM keeps working alongside it.
Matching plans to your trip
Japan eSIM plans by trip length
The same database, sliced by how long you stay and how you travel. Every pick below is a computed sort position — validity must cover the whole stay, and data must match the use case.
3–5 days
long weekend or city break
Japan eSIM 3GB / 14 Days
Roamic · 3GB / 14 days
$3.00
cheapest plan with at least 3GB and 5-day validity.
See the Roamic plan →7–10 days
the classic one-week trip
Japan eSIM 5GB / 21 Days
Roamic · 5GB / 21 days
$5.00
cheapest 5GB+ bucket with validity ≥ 10 days.
See the Roamic plan →Two weeks
longer tours and multi-city
Japan eSIM 10GB / 30 Days
Roamic · 10GB / 30 days
$9.00
cheapest 10GB+ bucket valid ≥ 15 days.
See the Roamic plan →30 days +
long stays and slow travel
Japan eSIM 50GB / 30 Days
Roamic · 50GB / 30 days
$33.00
best $/GB among 20GB+ plans valid ≥ 30 days.
See the Roamic plan →Best Japan eSIM by traveller type
Light user
maps, messaging, email
1GB / 3 Days
Roami · 1GB / 3 days
$1.99
lowest-price small bucket (1–5GB).
See the Roami plan →Standard tourist
navigation plus social and browsing
50GB / 10 Days
aloSIM · 50GB / 10 days
$27.50
best $/GB in the 5GB+ class.
See the aloSIM plan →Streamer & hotspot
video, tethering, multiple devices
Unlimited / 30 Days
Ubigi · unlimited / 30 days
$45.00
lowest cost per day without a GB counter.
See the Ubigi plan →Remote worker
calls, cloud work, weeks on the road
Japan eSIM 50GB / 30 Days
Roamic · 50GB / 30 days
$33.00
best $/GB among 30-day+ plans with 10GB or more.
See the Roamic plan →The lineup
Which eSIM providers cover Japan
Airalo
since 2019
The original eSIM marketplace
- +Widest country coverage in the industry
- +Established trust and brand recognition
- +Regional plans (Asia, Europe) for multi-country trips
- –No longer the cheapest in most single countries
- –Smaller data allowances at entry price points
aloSIM
since 2021
Budget eSIM app from Canada's AffinityClick
- +Built by AffinityClick, an Ottawa telecom company
- +Cheap country packs across 175+ countries
- +Free eSIM app with flexible top-ups
- –Fewer unlimited options than rivals
- –Support is self-serve first
Holafly
since 2018
Unlimited data, pay by the day
- +Unlimited-data plans in 190+ destinations
- +One-plan-per-country simplicity
- +Hotspot sharing included
- –Flat daily pricing gets expensive on long trips
- –No budget tier - one plan shape only
Roami
since 2024
App-first travel eSIM with 24/7 activation
Promo code web20 — 20% off your first order (new users) · all deals
- +Aggressive pricing across Asia
- +No ID verification for travel plans
- +24/7 activation and human support
- –Younger brand with fewer third-party reviews
- –Deepest discounts concentrate on 3-30 day plans
Roamic
since 2021
European eSIM brand with unlimited options
- +Backed by Spain's Byte Travel since 2021
- +170+ countries and regions
- +Unlimited-data options in many destinations
- –Younger brand with a thinner review track record
- –Unlimited plans carry fair-use limits
Saily
since 2024
The no-logs eSIM from the NordVPN team
Promo code VEEPEE25 — 25% off Saily eSIMs · all deals
- +Competitive per-GB pricing
- +Built by the Nord Security team
- +Flexible in-app top-ups
- –Newer service with a shorter track record
- –Destination list still growing
Ubigi
since 2017
Global 4G/5G eSIM from Transatel, an NTT company
Promo code WELCOME10 — 10% off your first Ubigi data plan · all deals
- +Operated by Transatel (NTT Group) since the 2017 eSIM launch
- +Coverage in 200+ destinations
- +Connectivity heritage across cars and laptops
- –Account setup required before buying
- –Entry prices above the budget brands
Yesim
since 2019
Swiss-based eSIM with pay-as-you-go data
- +Founded 2019 in Switzerland
- +Pay-per-use international eSIM across 140+ countries
- +Self-service business platform for teams
- –Smaller brand recognition outside Europe
- –Pay-per-MB international plan takes reading to compare
Before you buy
Things to know before buying a Japan eSIM
-
Japanese law requires passport verification for local prepaid SIM cards (SoftBank, Docomo, KDDI) - travel eSIMs bypass this entirely.
-
SoftBank's own tourist SIM can only be activated 09:00-21:00 JST; travel eSIMs activate 24/7, which matters for late-night arrivals at Narita or Haneda.
-
Pocket WiFi rental is Japan's classic connectivity option. It wins for groups of 3 or more, but a solo traveler almost always pays less with an eSIM.
Networks
Which networks do Japan eSIMs run on
Every eSIM connects to a local carrier network. Coverage, speed and rural reach follow that host network — so knowing whose mast your plan uses matters more than the brand on the voucher.
KDDI
5GPlans from Airalo, aloSIM, Holafly, Roami, Roamic, Saily, Ubigi, Yesim connect to this network.
Typical 20–250 Mbps — enough for HD streaming · video calls · navigation
Strong nationwide, with a particularly good grip on western Japan and coastal routes. City speeds rival Docomo.
Where it wins: Nationwide reach close to Docomo with fast city service.
Where it lags: Slightly thinner in a few remote island areas.
NTT Docomo
5GPlans from Airalo, aloSIM, Holafly, Roami, Roamic, Saily, Ubigi, Yesim connect to this network.
Typical 25–300 Mbps — enough for 4K streaming · video calls · hotspot work
Japan's gold standard for coverage — mountain passes, rural islands, basement floors. If your route leaves the cities, prefer a Docomo-based plan.
Where it wins: The widest coverage in Japan - the safest network for rural areas, mountains and islands.
Where it lags: Congestion can slow it at peak times in Tokyo.
SoftBank
5GPlans from Airalo, aloSIM, Holafly, Roami, Roamic, Saily, Ubigi, Yesim connect to this network.
Typical 15–250 Mbps — enough for HD streaming · video calls · navigation
Excellent in cities and on major tourist corridors, with 5G around big stations. Rural reach is good but a step behind Docomo.
Where it wins: Fast urban 5G and solid metro coverage.
Where it lags: Rural and mountain coverage trails Docomo.
Japan's local carrier market
- NTT Docomo eSIM-ready
- SoftBank eSIM-ready
- KDDI eSIM-ready
Matched against the 177 plans in the table above. Prefer plans on the carrier with the best coverage where you're going.
Which national networks cover Japan's major cities
All the carriers above serve these metros with full speed; the differences between them show up outside them — rural roads, mountain areas, islands and deep-indoor spots like basements and metro platforms.
Speeds are typical real-world downloads (4G floor to good 5G); actual speeds depend on device, plan and location. For context: Netflix 4K needs about 25 Mbps, HD about 5.
Independent measurements
Independent network data for Japan
The network profiles above are ours. The findings below come from independent measurement firms — Opensignal crowdsources real-user readings, Ookla aggregates Speedtest samples — so you can cross-check whose masts actually perform before picking a plan that rides them.
Opensignal · April 2026
- SoftBank won Download Speed outright with 65.1 Mbps; NTT docomo won Coverage (9.0 out of 10) and 5G Download Speed (159.1 Mbps).
- au led the national award count with 10 sole wins and 1 joint win.
Source: Japan, April 2026, Mobile Network Experience Report, Opensignal.
Ookla · award report
Ookla named SoftBank the fastest mobile network in Japan for H1 2026, with a median download of 73.8 Mbps ahead of au at 67.9 — and a median 5G download of 153.6 Mbps ahead of Rakuten Mobile.
Source: Ookla Speedtest report, 2026-08.
Ookla Speedtest Global Index
Ookla's index tracks Japan's median mobile download, upload and latency month by month — the live picture of how the whole market's networks compare.
Open Japan on the Global Index →Award findings are quoted from the named reports and link to the originals. Sources accessed October 2026; our own price and fair-use data follow the methodology.
FAQ
What should I know before buying a Japan eSIM
Which is the cheapest eSIM for Japan?
Among major providers, Roami currently has the lowest entry price for Japan at $1.99 for 1GB over 7 days, and its 3GB/7-day plan at $3.99 undercuts every competitor's budget tier. Saily is the closest challenger at $3.99 for 1GB. If you only need maps and messaging, either plan covers a short city break - but on a per-GB basis Roami's larger bundles are the strongest value in the market.
Is unlimited data eSIM in Japan really unlimited?
It depends on the provider's fair-use policy. Holafly markets unlimited data but applies fair-use throttling for heavy users, and its flat daily pricing (around $3.90 per day) makes 30 days cost $117. Roami's Japan unlimited plans list no documented fair-use cap for travel plans and cost less at every duration - $18.99 for 7 days versus Holafly's roughly $27 for the same window. Read each plan's fair-use terms before buying if you plan to stream heavily.
Is Airalo or Holafly better for Japan?
For short trips with light usage, Airalo: its 1GB/7-day plan at $4.50 beats Holafly's cheapest option, and fixed data buckets avoid fair-use ambiguity. For heavy streamers who hate topping up, Holafly's unlimited daily plan is simpler - expect around $3.90 per day. Neither is the cheapest overall: on our Japan comparison table both are undercut by Roami and Saily for the same data.
Do I need a passport or ID to use an eSIM in Japan?
No - not with travel eSIMs. Japanese law requires passport verification for local prepaid SIM cards from SoftBank, NTT Docomo and KDDI, but international travel eSIMs (Airalo, Holafly, Saily, Nomad, Roami) bypass this registration entirely. Buy, scan the QR code, and connect - no document upload at any step.
Which Japanese network does each provider use?
It varies, and it affects coverage. Roami and Nomad auto-switch across all three national networks (NTT Docomo, SoftBank, KDDI), which gives you fallback signal in rural areas. Airalo and Saily typically connect to Docomo or SoftBank. Docomo has the widest rural coverage - including Shinkansen corridors and onsen towns - so single-network plans locked to it are safe, but multi-network plans are more resilient.
Can one eSIM cover Japan and South Korea on the same trip?
Yes - several providers sell Asia regional plans that bundle Japan with Korea, Taiwan and Hong Kong. If you are visiting two or more countries, a regional plan usually beats buying separate country eSIMs. Check our regional comparison before buying two single-country plans.
Keep traveling
eSIM for your next destination
Travelers comparing Japan eSIMs often price these destinations next — each card opens a live plan table, checked the same day as the one above.
New to eSIMs
First time using an eSIM?
The plans above assume the basics. If this is your first eSIM, these five short reads take you from what an eSIM is to a working data connection before you board.
eSIM explained
What the technology actually is, minus the marketing.
SIM card alternative
Where eSIMs win and where a physical SIM still makes sense.
activating an eSIM
The install walkthrough for every provider we track.
supported phones
The 30-second EID test plus every compatible phone we verified.
dual SIM phones
Keep your home number while travel data runs on eSIM.
Data you can check.
Prices on this page were last verified Sep 30, 2026. Full collection rules in our methodology; how we make money in our disclosure.