Japan eSIM
Stay connected in Japan from €1.11. Instant eSIM with 5G data, delivered by QR — no physical SIM and no roaming bills.
Networks in Japan
Your eSIM connects automatically to DOCOMO, KDDI, NTT Docomo, Inc and Softbank at up to 5G speeds, picking depending on your selected plan, device and location.
Japan data plans
116 plans available · cheapest first, including 74 unlimited.
1 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now3 days · 4G · €1.34/GB
Buy now5 days · 4G · €1.46/GB
Buy now1 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now7 days · 4G · €1.55/GB
Buy now10 days · 4G · €1.67/GB
Buy now1 days · 5G
Buy now15 days · 4G · €1.79/GB
Buy now30 days · 4G · €1.88/GB
Buy now2 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now3 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now3 days · 4G · €0.89/GB
Buy now5 days · 4G · €0.93/GB
Buy now7 days · 4G · €0.96/GB
Buy now3 days · 4G · €0.59/GB
Buy now2 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now4 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now10 days · 4G · €1.04/GB
Buy now15 days · 4G · €1.07/GB
Buy now5 days · 4G · €0.64/GB
Buy now30 days · 4G · €1.11/GB
Buy now2 days · 5G
Buy now5 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now3 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now7 days · 4G · €0.73/GB
Buy now10 days · 4G · €0.76/GB
Buy now3 days · 5G
Buy now15 days · 4G · €0.84/GB
Buy now6 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now30 days · 4G · €0.91/GB
Buy now7 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now4 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now8 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now4 days · 5G
Buy now3 days · 4G · €0.57/GB
Buy now9 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now5 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now5 days · 4G · €0.62/GB
Buy now10 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now5 days · 5G
Buy now7 days · 4G · €0.67/GB
Buy now6 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now11 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now10 days · 4G · €0.72/GB
Buy now12 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now7 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now15 days · 4G · €0.78/GB
Buy now6 days · 5G
Buy now30 days · 4G · €0.81/GB
Buy now13 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now8 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now14 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now7 days · 5G
Buy now1 days · 5G
Buy now15 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now16 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now9 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now8 days · 5G
Buy now17 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now10 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now18 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now3 days · 4G · €0.57/GB
Buy now19 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now9 days · 5G
Buy now5 days · 4G · €0.60/GB
Buy now11 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now20 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now7 days · 4G · €0.63/GB
Buy now10 days · 5G
Buy now10 days · 4G · €0.67/GB
Buy now12 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now15 days · 4G · €0.71/GB
Buy now13 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now11 days · 5G
Buy now30 days · 4G · €0.75/GB
Buy now25 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now14 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now12 days · 5G
Buy now3 days · 4G · €0.54/GB
Buy now15 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now13 days · 5G
Buy now5 days · 4G · €0.57/GB
Buy now16 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now7 days · 4G · €0.61/GB
Buy now14 days · 5G
Buy now30 days · 4G · First 1GB/day at full speed, then 256kbps
Buy now17 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now10 days · 4G · €0.65/GB
Buy now15 days · 5G
Buy now18 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now15 days · 4G · €0.68/GB
Buy now16 days · 5G
Buy now19 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now30 days · 4G · €0.72/GB
Buy now20 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now17 days · 5G
Buy now3 days · 5G
Buy now18 days · 5G
Buy now3 days · 4G · €0.49/GB
Buy now19 days · 5G
Buy now5 days · 4G · €0.52/GB
Buy now20 days · 5G
Buy now7 days · 4G · €0.56/GB
Buy now25 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now10 days · 4G · €0.60/GB
Buy now15 days · 4G · €0.62/GB
Buy now25 days · 5G
Buy now30 days · 4G · €0.67/GB
Buy now30 days · 4G · First 2GB/day at full speed, then 256kbps
Buy now5 days · 5G
Buy now30 days · 5G
Buy now7 days · 5G
Buy now10 days · 5G
Buy now15 days · 5G
Buy now20 days · 5G
Buy now30 days · 5G
Buy nowWhy travelers choose Roamsim in Japan
- Instant delivery — your Japan eSIM arrives by QR seconds after payment.
- Flat, upfront pricing — no bill shock, no roaming surprises.
- Keep your main number while using local data on a second line.
- 24/7 in-app support from real people, wherever you travel.
Japan eSIM by plan size
Already know how much data you need? Jump straight to it.
Regional plans that cover Japan
Visiting more than one country? These regional eSIMs include Japan and are usually cheaper than buying each destination separately.
eSIM by city in Japan
Any Japan plan covers the whole country — these pages cover arriving, coverage and the local quirks city by city.
How to choose an eSIM for Japan
Which network you'll be on
Japan has four mobile networks: NTT docomo, KDDI (au), SoftBank and Rakuten Mobile. Travel eSIMs roam onto one or two of the first three, which cover the cities, the main rail lines and most rural areas. The networks our Japan plans use are listed on this page, so you can check before you buy.
How much data a Japan trip takes
Maps, translation apps and train timetables are the heavy daily users. A week of navigation, messaging and some social media fits comfortably in a few gigabytes; if you'll hotspot a laptop or stream on the Shinkansen, pick a larger plan or an unlimited one. The data guide below turns your own habits into a number.
eSIM vs pocket Wi-Fi
Pocket Wi-Fi rentals are still common in Japan, but they mean collecting a device at the airport, charging it every day and posting it back. An eSIM installs before you fly, connects when you land and works in your own phone. Pocket Wi-Fi only wins if you need to share one connection between several phones that can't take an eSIM.
A Japanese phone number
Travel eSIMs are data-only: you get mobile internet, not a Japanese phone number. Keep your home SIM active for calls and texts if you need them, and use apps like WhatsApp, LINE or FaceTime over data. Some restaurant and taxi bookings ask for a local number; a hotel phone number usually works instead.
Not sure how much you need? How much data do you need for a trip
Planning the trip? Japan travel guide: highlights, best time to visit, plugs, money and getting around
Japan eSIM — FAQ
How do I get an eSIM for Japan?
Pick a Japan data plan below, pay by card or crypto, and we deliver your eSIM instantly. Scan the QR code and you're connected in minutes — no physical SIM, no store visit.
Will my phone work with a Japan eSIM?
Most phones from the last few years support eSIM, including iPhone XS and newer, Google Pixel 3+, and recent Samsung Galaxy S/Z models. Your phone must be carrier-unlocked.
Does the Japan eSIM include 5G?
Yes — our Japan plans connect to 5G where the local network supports it, and fall back to 4G/LTE automatically.
Which network will I connect to in Japan?
Our Japan plans use partner networks including DOCOMO, KDDI, NTT Docomo, Inc and Softbank. Available networks depend on the selected plan, device and location.
Is there a plan that covers Japan and other countries?
Yes. Asia, Global Lite, Global Max and Global are regional plans that include Japan, which is usually cheaper than buying each country separately on a multi-stop trip.
Can I keep my own phone number?
Yes. The eSIM runs as a separate data line, so you keep your main number for calls and texts while using Japan data on the eSIM.
When does my plan start?
Activation rules vary by plan. Check the activation note at checkout before installing your Japan eSIM; some plans start on connection or first data use, while others have different activation rules.
What is the best eSIM for Japan?
The best one for your trip is the plan that runs on a strong network where you're going, has enough data for your days there, and is priced for that length. Compare the network, data and validity of the Japan plans on this page; for most city trips any plan on docomo, au or SoftBank coverage works well.
Does a Japan eSIM work on the Shinkansen and in the subway?
Yes, on the networks travel eSIMs use, coverage extends to major stations and most of the bullet-train routes, with occasional gaps in long tunnels. Subways in Tokyo and Osaka have coverage in stations and most tunnels.
Should I buy a Japan eSIM before I travel?
Yes. Buy and install it at home over Wi-Fi, keep it switched off, and turn it on when you land. You'll have data at the airport for the train or taxi instead of hunting for Wi-Fi.
Ready for Japan?
Get connected from €1.11 — installed before you land.