eSIM guides
Every eSIM article on the Japan eSIM blog, newest first.
How Much Data Do You Need for a Trip to Japan?
Maps through giant stations, camera translation, transit apps and photo backups — what Japan's everyday apps really use, and how to budget your data.
Japan eSIM vs Pocket WiFi: Which One Should You Take?
Pocket wifi means a pickup queue, a second device and nightly charging. An eSIM lives in your phone. An honest comparison for a trip to Japan.
Do You Need a Japanese Phone Number as a Tourist?
Most visitors never need a Japanese phone number. Where one does get asked for — reservations, tickets, deliveries — and the workarounds that work.
Airport SIM at Narita and Haneda: Counter vs Installing at Home
What buying a SIM on arrival at Narita or Haneda actually involves — counters, vending machines, timing — and what installing an eSIM at home skips.
Mobile Data on the Shinkansen and in Japan's Mountains
How mobile coverage behaves on the Shinkansen, on rural lines and in the Japan Alps — what works, where it genuinely drops, and how to prepare.