How to stay connected in Japan as a tourist
Pocket Wi-Fi, SIM card, roaming or eSIM? A practical guide to getting online in Japan, from the airport to the last train.
3 min read
Japan is one of the easiest countries in the world to travel around, but staying online takes a little planning. Free Wi-Fi exists in many stations, convenience stores and cafés, yet it often needs a sign-up, drops as soon as you walk away and won't help on a train or a mountain trail.
Here's how the main options compare, and how to set things up so you're connected the moment you land.
Why you'll want mobile data in Japan
You can get by without data, but almost everything is easier with it:
- Train navigation. Big stations have many exits and lines run by different companies. A maps app tells you the platform, the transfer and which exit to take.
- Translation. Camera translation turns menus, signs and ticket machines into something you can read.
- Bookings and tickets. Restaurant reservations, museum time slots and many attraction tickets live on your phone.
- Staying in touch. Messages, photos and calls home over WhatsApp or FaceTime.
Your four options
1. Roaming with your home carrier
The easiest option: do nothing and your phone connects. The catch is price. Many carriers charge a daily fee for roaming, and over a one or two-week trip those days add up. Check your carrier's rate for Japan before you go.
2. Pocket Wi-Fi rental
A small portable router you pick up at the airport or have delivered to your hotel. It works for several devices at once, which suits groups. But it's one more gadget to charge and carry, everyone has to stay close to it, and it has to be returned at the end.
3. Physical tourist SIM card
Sold at airports and electronics stores. It works, but you need to swap out your home SIM (and not lose it), and while it's out you won't receive calls or texts to your usual number.
4. Travel eSIM
You buy it online, install it before you fly and it connects to a local network when you land. There's no pickup, no return and no plastic card, and your home SIM stays in your phone for calls and texts. You'll need an eSIM-compatible, carrier-unlocked phone.
Setting up a Japan eSIM, step by step
- Check that your phone supports eSIM and is carrier-unlocked. Our compatible devices page explains how.
- Choose a plan size for your trip (see the data section below).
- Install the eSIM at home while you're on Wi-Fi: scan the QR code, use the one-tap install link or enter the details manually.
- Give the new line a clear name, such as "Japan" or "Travel".
- When you land, switch on the eSIM line, turn on data roaming for it and set it as your mobile data line.
- Keep your home line on for calls and texts if you like, but turn off data roaming on it to avoid charges.
Your plan's 30 days start when the eSIM first connects in Japan, not when you buy or install it. So you can set everything up days before your flight.
Practical tips for Japan
- Download offline maps for the cities you'll visit, and an offline Japanese pack in your translation app. They're useful in long tunnels and rural areas.
- Carry a power bank. Navigation, translation and photos all day drain a battery fast.
- Mind train etiquette. Talking on the phone in train carriages is generally frowned upon in Japan. Messaging is fine; save calls for the platform.
- Use hotel Wi-Fi for big downloads like app updates or offline maps, and keep mobile data for when you're out.
How much data do you need for Japan?
It depends on how you use your phone, but as a rough guide for one week: around 3 to 5 GB covers maps, messaging, translation and some social media. If you post a lot of video, make video calls or share your connection with a laptop, 10 GB or more is safer.
Not sure? Our guide to how much data you need for a week walks through it. And if you run low, you can top up the same eSIM without reinstalling.
