Questions about staying connected in Japan

If your phone is unlocked and supports eSIM, an eSIM is usually cheapest for one person and there’s nothing to carry or return. Pocket WiFi makes more sense for groups sharing one connection, or if your phone can’t take an eSIM. eSIM vs pocket WiFi

Most recent phones work, as long as they’re unlocked. All Japanese networks are now 4G and 5G only: docomo switched off its 3G network on 31 March 2026, after au and SoftBank. Will my phone work in Japan?

For maps, messaging and some social media, around 0.5 to 1GB a day is typical. Video and hotspot use push that much higher. How much data you need

Yes, if your carrier includes Japan. Check the daily price and any speed caps first, since a local eSIM is often cheaper for trips longer than a few days.

Usually not. Most travel eSIMs are data only, so you keep your home number for calls and messages, and use apps like WhatsApp or LINE over data. Voice + data eSIMs for visitors exist, but need an in-person ID check. Getting a Japanese phone number

Most visitors don’t. It mainly matters for some restaurant bookings and services that verify you by SMS. When you need one

Yes, the main international airports have rental counters and some have vending machines, but booking online first is usually cheaper and guarantees stock. Airport pickup guide

Airports, many train stations, convenience stores and cafes offer free WiFi, often after a short sign-up. It’s handy as a backup, but too patchy to rely on for maps while you’re out.

Use a travel eSIM or pocket WiFi for your first weeks, then switch to a monthly plan once you have your residence card. Long-stay options