Our recommended eSIMs for Japan
Japan rewards a good connection: you will lean on maps, translation and transit apps almost constantly, and a rented pocket-wifi device is one more thing to collect, carry and hand back. An eSIM installs in minutes, keeps your home number active for messages and codes, and switches on the moment you land.
Airalo
Best valueThe broadest coverage — 200+ countries — and strong value. Buy exactly the data you need.
Check Airalo plans →Yesim
Most flexiblePer-country, regional, pay-as-you-go and a global plan across 150+ destinations.
Check Yesim plans →Saily
NordVPN teamA reliable, security-minded eSIM from the team behind NordVPN, with a clean app.
Check Saily plans →Holiday.com
ExpressVPN teamA global travel eSIM for 150+ destinations from the team behind ExpressVPN — one eSIM you top up as you go, with a privacy focus.
Check Holiday.com plans →Plans, prices and coverage change often — confirm the current plan on each provider's own page before buying. Links are affiliate links; see our disclosure.
Coverage in Japan
Coverage is excellent nationwide, including the metro networks, the shinkansen corridors and most rural and mountain areas, because travel eSIMs ride Japan's major carrier networks. Deep-mountain and remote-island spots can still be patchy, as they are for everyone.
How much data do you need?
- ◆Light use (maps, messaging, translation): 1–3GB for a week is usually enough.
- ◆Normal use (social, photos, some video): a 5GB+ plan, with the option to top up.
- ◆Heavy use (streaming, tethering, sharing): buy a larger data allowance.
Getting connected on arrival
- 1Buy your plan before you fly, while you still have your home connection.
- 2Install the eSIM when prompted (scan the QR code or tap install in the provider's app), and label the line so it is easy to find.
- 3On arrival, turn the travel eSIM's data on and enable data roaming for that line.
- 4Set your home line to 'data off' so you are never billed for roaming, and keep it active for calls, texts and two-factor codes.
Sort the rest of your Japan trip
Compare car-hire deals across Japan from all the major rental companies in one search — most bookings come with free cancellation, and prices are usually lowest when you book ahead.
Compare car hire in Japan →Find somewhere to stay in Japan — from city hotels to coastal boltholes — with free cancellation on most rooms. Filter by area and read verified guest reviews before you book.
Where to stay in Japan →JR passes, Tokyo and Kyoto tours, teamLab and attraction tickets — reserved before you go.
Book tours, transfers & attraction tickets →If your flight to Japan is delayed or cancelled, you may be owed compensation.
Claim for a delayed flight →Frequently asked questions
Does an eSIM work in Japan?
Yes. Travel eSIMs from providers like Airalo, Yesim and Saily work across Japan by connecting to the country's major carrier networks. Your phone must support eSIM and be carrier-unlocked.
Which is the best eSIM for Japan?
For most travellers, Airalo offers the best value on Japan and Asia-regional plans. If you use a lot of data — heavy translation, maps and streaming — a larger Airalo or Yesim plan avoids running out.
Do I still need a pocket-wifi in Japan?
For most trips, no. An eSIM gives each traveller their own connection on their own phone, without a separate device to charge, carry and return. Pocket-wifi can still make sense for large groups sharing one connection.