Skip to content
TripoSIM

Japan travel guide

Emergency numbers, how to stay online, and the apps locals use. Save this page before you fly.

Emergency numbers

Tap a number to call it.

Police110Ambulance119Fire119

Mobile data in Japan

  • Very fast 4G and 5G in cities and most towns.
  • Signal can drop in tunnels and deep mountain areas.
  • Your eSIM connects as roaming on local networks, so turn on Data Roaming for it when you land. There are no extra roaming charges.

Useful apps

  • Google Maps: very good train and subway directions
  • GO: book taxis in Tokyo and other cities
  • Suica in Apple Wallet: tap to ride trains and pay in shops (iPhone)
  • Google Translate: point your camera at Japanese signs and menus

Good to know

  • Many small shops and restaurants still prefer cash. 7-Eleven ATMs accept most foreign cards.
  • In Japan, 110 is the police and 119 is an ambulance or fire.

Japan eSIM plans

1 GB for 7 days

$1.40

Unlimited for 2 days

$1.86

Unlimited for 3 days

$2.17

See all Japan plans →

Get this guide by email

We will email you this guide, plus one reminder before you fly to install your eSIM.

Stay online from the moment you land

Install your eSIM at home on Wi-Fi. Your plan only starts when it first connects to a network in Japan.

Get a Japan eSIM

Checked on 2026-10-22. Numbers and rules can change, so please check locally when you arrive. In a life-threatening emergency, call the local emergency number right away.