Japan: Mobile Coverage & Carriers
ESIMBYCOUNTRY at checkout · See all codes →Japan has four major mobile network operators: NTT Docomo, au (KDDI), SoftBank, and Rakuten. All three established generations—3G, 4G/LTE, and 5G—are commercially launched in the country. Roaming eSIMs typically connect via LTE bands B1 (2100 MHz), B3 (1800 MHz), B8 (900 MHz), and B18/B26 (800 MHz), with 5G access on bands n77/n78 (3.7 GHz), n79 (4.5 GHz), and n257 (mmWave).
Local carriers in Japan issue eSIMs, making them available for both domestic and roaming customers. Coverage and network quality vary by operator and location, particularly in rural areas.
| Connectivity | As publicly reported |
|---|---|
| Network generations | 3G, 4G/LTE, 5G |
| Main mobile networks (MNOs) | NTT Docomo, au (KDDI), SoftBank, Rakuten |
| Key travel bands | B1(2100), B3(1800), B8(900), B18/B26(800), n77/n78(3.7GHz), n79(4.5GHz), n257(mmWave) |
| Local eSIM support | Local carriers issue eSIMs |
| Region | Asia |
| Capital | Tokyo |
| Calling code | +81 |
Travel-eSIM country connectivity cheat-sheet
Each country's mobile generations, carriers and roaming-vs-eSIM verdict on one page. Free. No prices — those come from the provider feed.
eSIM for Japan → · eSIM vs roaming →
eSIM providers covering Japan
| Provider | Destination coverage | Activation | Plans |
|---|---|---|---|
| Sim Local | Dedicated Japan destination page (verified on the provider's site 2026-07-14) | Digital delivery — installs as an eSIM profile on an eSIM-capable, unlocked phone | See plans →10% off with our code ESIMBYCOUNTRY at checkout |
Provider destination pages checked on 2026-07-08 and 2026-07-14. Plans and prices are live on the provider's site — never stored or estimated here. We only list partners we can link and verify directly; this table grows as more providers pass review. How we compile this →
Compiled from public-record telecom facts (the MNO roster, commercially-launched 3G/4G/5G generations, deployed travel-relevant bands and local-eSIM support) and verified June 2026; see the source we compile this country from. How we compile this. Plan prices are supplied by the eSIM provider feed at publish time, not stored here.