Mobile coverage in Japan
4 carriers support eSIM Japan plans in Japan. Tap any operator below to see their official coverage map.
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.
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.
Carriers in Japan
Each link opens the operator's own coverage map in a new tab — the most authoritative source for what's actually live in your destination.
Coverage maps are maintained by each operator and reflect their current network footprint. Your eSIM Japan roams onto these networks automatically — no manual selection required.
Ready to travel to Japan?
158 active plans, starting from a few dollars.