Staying connected in Japan

Japan's mobile networks are among the fastest in the world, with 5G rolling out across Tokyo, Osaka, Nagoya, and Kyoto. 4G/LTE covers virtually the entire country, including rural areas and most of the rail network. Google Maps, translation apps, and IC card apps all work smoothly on mobile data, which makes moving between neighborhoods and stations much easier. If you're taking the Shinkansen, expect brief signal drops in tunnels—your connection usually returns automatically. During cherry blossom season and Golden Week, public Wi-Fi can feel overloaded. Having your own eSIM keeps maps, bookings, and messages reliable without relying on crowded hotspot networks.