A Japan eSIM is a virtual SIM card that connects you instantly to Japanese mobile networks (NTT Docomo, SoftBank, KDDI/au) without a physical card. Plans start at $5.50 for 1 GB, up to $47 for unlimited.
Do you really need an eSIM? Japan is not in the European Union: no free EU roaming. International roaming fees are very high ($5-10/MB). An eSIM is therefore essential to avoid astronomical bills.
1000 plans found · Last update:
| # | Plan | Data | Duration | Price/GB | Promo code | Price |
|---|---|---|---|---|---|---|
1 |  Japan 3 GB for 15 days LinkeSIMNTT docomo | 3.00GB | 15 days | $0.93 | - | $2.80 |
2 |  Japan GoMoWorld | 17.00GB | 30 days | $0.63 | -10% | $10.78$11.98 |
3 |  Japon Forfait eSIM prépayée - Données illimitées | Ubigi Ubigi | Unlimited | 7 days | ∞ | -10% | $24.53$27.25 |
4 |  15 days - Unlimited5G Saily | Unlimited | 15 days | ∞ | -5% | $46.54$48.99 |
5 |  Japan – 7 jours GigSkyNTT Docomo | 0.10GB | 7 days | $0.00 | -15% | $0.00 |
6 | Corée Du Sud Forfait eSIM prépayée - 3Go | Ubigi Ubigi | 24.00GB | 360 days | $0.37 | -10% | $8.83$9.81 |
7 | Japan 50 GB for 180 days LinkeSIMNTT docomo | 50.00GB | 180 days | $0.64 | - | $32.00 |
8 |  Japan 50GB 180 Days5G AdventureSIMsKDDI/au | 50.00GB | 180 days | $0.79 | -10% | $39.63$44.03 |
9 |  Japan 50GB 180Days Esimflare | 50.00GB | 180 days | $0.76 | -10% | $37.80$42.00 |
10 |  Japan 50GB 180Days5G Ezy eSIM | 50.00GB | 180 days | $1.10 | -10% | $55.00$61.11 |
11 |  Japan - No Expiration5G RoamlessKDDI | 3.00GB | 365 days | $2.45 | - | $7.35 |
12 | Japan - No Expiration5G RoamlessKDDI | 6.00GB | 365 days | $2.45 | - | $14.70 |
13 | Japan - No Expiration5G RoamlessKDDI | 7.00GB | 365 days | $2.45 | - | $17.15 |
14 | Japan - No Expiration5G RoamlessKDDI | 9.00GB | 365 days | $2.45 | - | $22.05 |
15 | Japan - No Expiration5G RoamlessKDDI | 15.00GB | 365 days | $2.45 | - | $36.75 |
Japan is not a member of the European Union. No free roaming applies. French carriers typically charge $5-10 per MB in Japan, which can quickly generate bills of several hundred euros for just a few days of travel.
Japan has exceptional 4G/5G coverage (99.9%), even in the most remote rural areas, thanks to three major carriers:
| Carrier | Coverage | 5G | Used by |
|---|---|---|---|
| NTT Docomo | 99.9% | Yes | Airalo, Ubigi |
| SoftBank | 99.5% | Yes | Holafly, GoMoWorld |
| KDDI/au | 99.3% | Yes | Saily |
Compatibility: iPhone XS+, Samsung S20+, Pixel 3+, Xiaomi 12+, OnePlus 8+
<BlogSummaryTable title="Top 5 Japan eSIM 2026" countryCode="JP" countrySlug="japan" plans={[ { rank: 1, providerId: "airalo", data: "10 GB", duration: "30 days", price: "$14", highlight: "Global leader + NTT Docomo network", promoCode: "ESIMP15", }, { rank: 2, providerId: "holafly", data: "Unlimited", duration: "15 days", price: "$47", highlight: "Unlimited data + hotspot", }, { rank: 3, providerId: "gomoworld", data: "10 GB", duration: "30 days", price: "$16", highlight: "SoftBank network (99.5% coverage)", promoCode: "ESIMP", }, { rank: 4, providerId: "saily", data: "3 GB", duration: "30 days", price: "$9.80", highlight: "NordVPN included", promoCode: "ESIMP", }, { rank: 5, providerId: "ubigi", data: "10 GB", duration: "30 days", price: "$17.50", highlight: "Premium NTT Docomo network", }, ]} />
For all travelers to Japan, an eSIM is essential: no free EU roaming, prohibitive roaming fees ($5-10/MB).
Our recommendation: Airalo 10 GB at $14 with code ESIMP15 offers the best value on the NTT Docomo network (Japanese leader).
For heavy users: Holafly unlimited eliminates any overage stress.
Developer and digital nomad, I lived between Canada and the United States before continuing to explore the world. After struggling with internet connectivity abroad one too many times, I created eSIM Planet to compare plans clearly and honestly. Every article is carefully written and reviewed to save you time and money.
