eSIMs for Japan

How do you want your data?

Daily unlimitedA high-speed allowance every day, refilled at midnight. Once a day's allowance is used, data keeps working at a reduced speed. Pick 1–90 days.Fixed dataOne bucket of data for the whole trip. No daily reset and no throttling — it lasts until you use it up. Pick a size and a length.

Build your own Unlimited Japan plan

Choose your high-speed data per day, the speed after the daily cap, the network and how many days you need.

High-speed data per day

Speed after the daily cap

Network

Number of days

7 days

Total

$5.64

≈ $0.81 per day

Continue

Visiting more countries?

One eSIM can cover every stop on your trip. See the regional plans that include Japan.

See Asia plans See Global plans

About Japan

Japan's prepaid SIM market is tourist-unfriendly — most contracts require a Japanese address and a hanko seal. A roamgo eSIM works around all of it: install at home, activate at Narita or Kansai, and you're navigating the Tokyo subway map within minutes of landing.

Best for: First-time Tokyo visitors needing Google Translate and Tabelog; bullet-train travellers between Tokyo, Kyoto, and Osaka; ski-season trips to Niseko or Hakuba.
Networks: Roams onto NTT Docomo, SoftBank, and au by KDDI. Docomo has the strongest coverage in mountainous areas (Mt Fuji climbers, ski resorts); SoftBank tends to be fastest in central Tokyo.
Travel tip: 5G is rolling out fast in the Greater Tokyo and Osaka areas but rural prefectures stay 4G LTE — both are fast enough for video calls and offline-map downloads.