Quick answer: Most travelers to Japan will be fine with eSIM (instant setup, no pickup). If you’re traveling with 3 or more devices, Pocket Wi-Fi can be a practical alternative. This page is an overview. Use the links below to decide what’s best for your trip. Start here: eSIM vs Pocket Wi-Fi (which should you choose?) Best eSIM for Japan (2026) How to set up an eSIM (step-by-step) At a Glance TypeProsCons eSIM No pickup required • Activate in minutes • Ideal for solo travelers Higher data tiers may cost more • Uses phone battery Pocket Wi-Fi Share multiple devices ...