eSIM for Japan
Buy a prepaid travel eSIM for Japan and pay in cryptocurrency. You get local 4G/5G data on partner networks without a contract or a local address. No documents, no account and no email: you pay in crypto and the QR code appears on the page.
Part of our Asia plan.
Buying an eSIM for Japan
- Pick a plan that covers Japan — a single-country plan is cheapest per gigabyte, a regional plan pays off the moment you cross a border.
- Pay with USDT, BTC, ETH, SOL, TON or XMR. No email address, no account, no card.
- Scan the QR that appears on the page. Do this at home over Wi-Fi rather than on airport Wi-Fi after landing.
- On arrival, set the eSIM as your data line and turn data roaming ON for it. This is the single most common reason a correctly installed profile shows no data in Japan.
Coverage and network quality in Japan
Among the best networks in the world. Dense 5G across Tokyo, Osaka, Kyoto and Nagoya, and reliable 4G on the Shinkansen and in the mountains.
Mobile data in Japan: what actually matters
Japan runs on four networks: NTT Docomo, KDDI (au), SoftBank and Rakuten Mobile. The first three cover nearly every place a visitor goes, from Tokyo subway platforms to the tunnels on the Tokyo to Osaka Shinkansen. Rakuten is the newest and still thinner outside cities, which only matters if you head for the Alps, Shikoku or rural Hokkaido.
So why do so many visitors use an eSIM here? Most Japanese SIM cards that come with a phone number need a residence card. Short-term visitors end up choosing between a data-only SIM from an airport counter and a rented pocket Wi-Fi that has to be carried, charged and returned before the flight home. An eSIM skips both. Install it at home, and by the time you reach immigration at Narita or Kansai, maps and translation already work.
Japan is one of the pricier countries for mobile data, so size the plan honestly. Maps, translation, messaging and photo uploads for two weeks usually fit into 5 to 10 GB. If you work from cafés or tether a laptop, an unlimited plan is simpler than topping up.
Which plan to pick for Japan
- A week of sightseeing: 1 to 3 GB.
- Two weeks with maps on all day: 5 GB for 15 days or 10 GB for 30 days.
- Japan plus Korea, Thailand or Vietnam: one Asia plan covers all of them, so you don't swap eSIMs between flights.
- Need SMS, for example a restaurant booking confirmation: there is a Japan plan with calls and SMS on the number page. The card shows which country the number is from before you pay.
Read next: Best eSIM for Japan · Holafly Japan review · Airalo Japan review
Japan eSIM plans and prices
| Data and validity | Price | Price per GB |
|---|---|---|
| 1 GB · 7 days | $2.80 | $2.80 |
| 5 GB · 15 days | $16.28 | $3.26 |
| 10 GB · 30 days | $18.80 | $1.88 |
| Unlimited · 7 days | $94.15 | — |
Japan is also covered by these plans: Asia, Southeast Asia, World, World Lite.
eSIM vs roaming vs a local SIM in Japan
- Roaming on your home plan is the expensive default — typically $10–15 a day, billed per day whether you use it or not.
- A local prepaid SIM is cheap but costs you an hour on arrival, usually an ID, and a phone number you will not keep. In Japan, that trade only makes sense on a long stay.
- A travel eSIM sits in between: local-network speeds, no shop visit, no paperwork, and your own number stays live on your physical SIM for calls and SMS.
Compatible devices
Check your phone: dial *#06# and look for an EID. Model by model: the compatibility page.
Practical notes for Japan
Data-only is not a limitation in Japan — LINE and messaging apps cover practically all local communication, and pocket-Wi-Fi rental is the expensive alternative you are skipping.
Related
- All destinations
- No-KYC eSIM: the complete guide
- How it works
- Check your phone supports eSIM
- Pay with Bitcoin
- Pay with USDT
Frequently asked questions
Do I still need a pocket Wi-Fi in Japan?
No. Pocket Wi-Fi made sense when a phone could hold one SIM. With an eSIM your phone has data on its own, and you can turn on the hotspot if someone travelling with you needs it.
Does the eSIM work on the Shinkansen?
Yes. The busiest line, Tokyo to Osaka, has coverage in its tunnels, so at worst you'll see short drops rather than long dead zones.
Will a phone bought in Europe or the US work on Japanese networks?
Almost always. Recent iPhones, Pixels and Galaxy flagships support the bands used in Japan. To check eSIM support, dial *#06# and look for an EID.
Do I need an ID or KYC to buy an eSIM for Japan?
No. Cypher eSIM never asks for a name, email, phone number or government ID. You pay in cryptocurrency and the QR code appears on the page — that is the whole flow, for Japan and everywhere else we cover.