Airalo
Marketplace model with Japan-specific and regional Asia plans; app-based top-ups.
Link coming soon
Connectivity
eSIM for Japan: what actually matters
Install before you fly, land connected, skip the airport SIM counter. Any major travel eSIM works in Japan — the differences are in the details below.
What to compare
| Check this | Why it matters |
|---|---|
| Network used | Docomo and KDDI(au) roaming both cover Tokyo well; coverage differs in rural areas. |
| Data-only vs voice | Most travel eSIMs are data-only. You keep your home number for SMS codes — check roaming cost for that. |
| Tethering | Not all plans allow hotspot use. Essential if you carry a laptop. |
| Top-up method | In-app top-up beats buying a new plan mid-trip. |
| Activation policy | Some plans start counting days at purchase, others at first connection. |
Provider candidates
Listed alphabetically. We have not ranked these yet — a ranked comparison with current prices will follow once our review is complete.
Holafly
Known for unlimited-data plans; check the tethering policy before relying on hotspot use.
Link coming soon
Saily
eSIM service from the Nord Security family; straightforward fixed-data plans.
Link coming soon
Ubigi
Runs on NTT Docomo's network in Japan; plans can be managed from the built-in device menu on some phones.
Link coming soon
Good to know
Do I need an eSIM, or is airport Wi-Fi enough?
Free Wi-Fi exists at the airports and many stations, but it is patchy in between — and you want maps and train search exactly when you are moving. A data eSIM removes the gamble for a few dollars a day.
Can I buy a SIM at the airport instead?
Yes — both airports have SIM counters and vending machines. They work fine; you simply pay airport prices and spend arrival time on it. Installing an eSIM before you fly does the same job without the queue.
Will my phone work with an eSIM?
Most phones from the last several years support eSIM, but carrier-locked phones may not accept one. Check that your phone is unlocked before buying any plan.
Disclosure
This page currently contains no affiliate links. If affiliate links are added in the future they will be clearly disclosed here, and they will never affect how providers are ranked.