Rachel Adams★★★★★No more roaming charges
This is what a frequent traveler needs. No more surprise roaming fees, I just buy a plan before the trip and I'm online the minute I arrive. Highly recommend.
Japan eSIMby RedSim4.812K+ ratings for RedSim apps
Official app
Japan eSIM app
Japan-wide 5G internet on NTT docomo and SoftBank. Buy, install and top up right in the app.
Tokyo · Osaka · Kyoto · Sapporo · Fukuoka
Scan to downloadPoint your phone camera here.
Free downloadiPhone, iOS 15 or laterAndroid with eSIMNTT docomo · SoftBank
The official Japan eSIM app, made by RedSim (Forceplay OÜ, Estonia). In the App Store it is sold by FORCEPLAY OU.
Plans in the app
Japan eSIM plans and prices
The same plans and prices as on this site, in your currency. Tap a plan for its details.
- 1 GBValid for 7 days$220$2.20/GB
- 3 GBValid for 30 days$665$2.22/GB
- 5 GBValid for 30 days$879$1.76/GB
- 10 GBValid for 30 days$1435$1.44/GB
- 20 GBValid for 30 days$28.70-24%$2195$1.10/GB
- 50 GBBest valueValid for 30 days$71.75-53%$3350$0.67/GB
Also: day passes from $1.93 a day with 1 GB.
Plan details
- Network
- NTT docomo, SoftBank · 5G
- Delivery
- QR by email, instant
- Activation
- Instant setup
- Buy now, use later
- Within 365 days of purchase
- Validity start
- First connection
- Top-ups
- Anytime, no new QR
- Hotspot
- Allowed
- eKYC / ID
- Not required
- Usage tracking
- Real-time, in the app
- Refund
- Full, if never installed
Fair Usage Policy
Lower speed of 1 Mbps after 3 GB usage per day.
Can I activate later?
You have 1 year to activate your eSIM, until Oct 3, 2027. Buy now and install whenever you are ready.
Price check
Japan eSIM prices compared
The same plans at Airalo and Yesim, side by side with ours.The same plans at Airalo and Yesim, side by side with ours.
| Plan |  Airalo |  Yesim |  Japan eSIM |
|---|---|---|---|
| 5 GB30 days | $11 | $10.56 | $8.79−20% |
| 10 GB30 days | $18 | $19.20 | $14.35−25% |
| 20 GB30 days | $25 | $29.76 | $21.95−26% |
| Unlimited7 days | $26.50 | $29.40 | $18.05−39% |
| Unlimited15 days | $48 | $43.20 | $38−21% |
| Unlimited30 days | $69 | $66 | $58.39−15% |
Lowest price on all 6 plans, up to 39% less than Airalo and Yesim.
| Plan |  Airalo |  Yesim |  Japan eSIM | You save |
|---|---|---|---|---|
| 5 GB 30 days | $11 | $10.56 | $8.79 | −20% |
| 10 GB 30 days | $18 | $19.20 | $14.35 | −25% |
| 20 GB 30 days | $25 | $29.76 | $21.95 | −26% |
| Unlimited 7 days | $26.50 | $29.40 | $18.05 | −39% |
| Unlimited 15 days | $48 | $43.20 | $38 | −21% |
| Unlimited 30 days | $69 | $66 | $58.39 | −15% |
Lowest price on all 6 plans, up to 39% less than Airalo and Yesim.
Prices on each provider's own website on October 1, 2026, in US dollars, for the same data and validity. Theirs change; ours on this page are live. Savings are against the highest price in each row.
Gift balance
25% gift balance on every purchase
Every order adds 25% of its price to your wallet, automatically. Spend it on your next eSIM.
50 GB, 30 daysYou pay $33.50+$8.38to your balanceHow it works
Online in three steps
Set it up at home, then switch it on when you land.
- 1
Download and pick a plan
Free on the App Store and Google Play. Plans for a day, a week or a month, or unlimited.
Free download - 2
Install with one tap
The app installs the eSIM on your phone in one tap.
About a minute 
3Land and you're online
Switch the eSIM on when you land. Track your data and top up in the app.
Live data tracking
Why travellers use it
Everything in one app
24/7 live support
Our team answers in the app, by email and on WhatsApp, day and night.
Track data in real time
See exactly how much data is left, with an alert at 80% so you never run out.
Top up any time
Add more data to the same eSIM in seconds. No new QR code.
Japan3.4 GB / 10 GB
+5 GB · 30 days$8.79
+10 GB · 30 days$14.35
Top upNo ID needed
Buy and use it without a passport, ID or KYC check. No contract either.
No passport or IDNothing to upload, no KYC
No contractKeep your numberHotspot allowed
Install in one tap
No QR scanning needed. The app installs your eSIM directly on your phone.
Install eSIM with a single tap. No QR code scanning needed.Activate eSIM
Travelers love RedSim
Real reviews from real trips.
4.812K+ ratings
Rachel Adams★★★★★
Katarzyna Nowak★★★★★Easy to use 🙂
really nice app and simple to use. i keep it installed now and just top up before each trip. support was helpful too when i asked something
Marta Gómez★★★★★Great coverage for the price
Very happy with it. Used it on trips to Turkey and Egypt and the coverage was stable everywhere. The price was much better than what my carrier wanted to charge me for roaming.
Aoife Byrne★★★★★Kept my own number for calls
I kept my normal SIM for calls and texts and just used this for data, so I still had my home number the whole trip. Set the eSIM as the data line and that was it. Worked without a hitch in the US and Canada.
Priya Sharma★★★★★No issues anywhere in Japan
Had a stable connection the whole trip, even on the train between Kyoto and Osaka. The speed was more than enough for maps, messages and video calls home.
Giulia Ricci★★★★★Friendly app, great support
The app is genuinely easy to use and support was quick and helpful when I had a question. Everything worked as described on my trip through Portugal and Spain. Would happily recommend it.
Wei Ling Tan★★★★★Was skeptical, now I'm sold
honestly wasn't sure a digital sim would be this simple. bought it, the qr code was in my email straight away, and i was connected within a couple of minutes. worked well for a week in italy. it just took me a moment to find where to switch on data roaming
Emre Kaya★★★★★Support replied in minutes
had a question about my plan before flying and messaged them on whatsapp. someone got back to me in a couple of minutes and sorted it out. good service
Michael Chen★★★★★Perfect for hopping between countries
I move between a lot of countries for work and this saved me from buying a new SIM in each one. One app, pick the plan, done. Exactly the flexibility I was after.
Nina Keller★★★★★One plan for the whole family
bought one of the bigger plans and shared it with my kids over a hotspot on our trip around mexico. saved us buying sims for everyone and it easily lasted the week. setup was painless too
Jonas Weber★★★★★One plan across four countries
I used the same regional plan in Spain, France, Italy and Germany. It moved between networks at every border on its own, no reinstalling anything. Very convenient for a road trip.
Julien Moreau★★★★★Tested in six countries, no problems
The coverage and speed have been great. I've used it in six countries now without a single issue. Would recommend it to anyone travelling around Europe.
Tom Bradley★★★★★Fast, even out on the islands
Fast in Bangkok and still had a decent signal out on the islands. Streamed a match one night with no buffering. Took a minute to find the right plan but no complaints after that.
Thabo Nkosi★★★★★Solid in London and Paris
used it in london and paris last month. it connected as soon as i landed and the speed stayed strong the whole trip, even picked back up quickly down in the underground. will use again
Sofía Ramírez★★★★★Just works every time
used it on three trips now and it connects every time without me thinking about it. online before i even reach the gate most times. no complaints at all
Sarah Mitchell★★★★★Worked the moment I landed
Used it in Italy and France for three weeks. It picked up a signal as soon as I landed both times and I never had to open the settings. Really happy with it.
Yuki Tanaka★★★★★Reliable across Europe
I used it in several European countries and it worked without any real problems. The internet was fast, close to what I get at home. Dropped once in a rural area but came back quickly.
Lars de Vries★★★★★installs in under a minute
scanned the qr code and it was ready before i finished packing. no swapping sims, no queue at a shop when you land. this is how it should work
Aisha Al Farsi★★★★★Held up for a month of work
I tether my laptop most days and it kept up without dropping out. The bigger package lasted the full month and the speed stayed steady the whole time. Will buy again.
Ana Costa★★★★★My parents set it up themselves
bought it for my parents before their holiday and they installed it with the qr code on their own, no help from me. they were online the minute they landed, which says it all
Carlos Mendes★★★★★Setup was really simple
installed it at home before flying to new york and just turned it on when i landed. it connected by itself, nothing to set up at the airport. exactly what i wanted
Erik Lindqvist★★★★★Good value, quick top-ups
cheaper than roaming with my own provider and topping up in the app takes a few seconds. only wish the largest plan was a little bigger, but for two weeks it was plenty
Min-jun Park★★★★★Covered my whole Asia trip
Took it through Thailand, Vietnam and Singapore on one trip and the coverage held up in every city. Data was fast enough for maps and video calls the entire time.
Japan eSIM app, answered
Yes. Japan eSIM is free on the App Store and Google Play. You only pay for the data plan you choose.
Buy a plan in the app and tap Activate eSIM. The app installs the eSIM on your phone in one tap, and a QR code is there if your phone asks for one. It takes about a minute.
Japan eSIM is made by RedSim, run by Forceplay OÜ in Tallinn, Estonia. In the App Store it is listed as Japan eSIM by FORCEPLAY OU. Its App Store id is 6806705040. On Google Play its package name is com.esim.japan.
From the store buttons on this page, which open our own listings. Its official page is redsim.app/japan-esim-app. Other websites that use the name Japan eSIM are not run by us.
Yes. Japan eSIM is made by RedSim. The same email signs you in to both apps, with the same balance.
Yes. RedSim is data-only and runs next to your normal SIM, so your own number stays active and WhatsApp, Telegram, Instagram, FaceTime and every other app keep working over the eSIM's data with no local blocks. There is no passport, ID or KYC to buy or use it.
Your plan does not start when you buy it. The validity begins when the eSIM activates, so set it up shortly before you travel rather than weeks ahead. Install it over Wi-Fi, switch on data roaming for the new line, and the moment you land you're online.
It depends on the plan, usually 6 months to a year from purchase. Your account shows the exact 'Install by' date, so you can buy early with no risk, since the days only begin once you connect abroad.
Your eSIM connects to NTT docomo and SoftBank on 5G where available, the same networks locals use.
Any eSIM-capable, carrier-unlocked phone, including most iPhones from XR onward and recent Android models. Check your model here.
Yes. Open My eSIMs in your account and tap 'Top up data' on your active eSIM. No new QR code needed.
If you have not installed or activated the eSIM yet, it is fully refundable, just message support. Once it has connected it cannot be refunded, but an eSIM that never connects is always covered. See the refund policy.
Yes, switch on data roaming for the eSIM line. It is just how the eSIM reaches the local network, not an extra charge, and your home SIM is not affected.
Plans start at $1.93 for a one-day pass with 1 GB. Prepaid plans start at $2.20 for 1 GB valid for 7 days. You pay once, there is no subscription, and the QR code arrives by email right after purchase.
You pay one price for unlimited data during the plan's validity. Some unlimited plans slow down after very heavy daily use under a fair-use policy, and the exact terms show before you buy.
One account, every app
Our apps
Sign in with the same email in any of them. Your balance comes with you.
About the app
What is Japan eSIM?
Japan eSIM is an iPhone and Android app by RedSim for 5G internet across Japan. It sells prepaid eSIM data plans on the NTT docomo and SoftBank networks, from $1.93, and installs the eSIM on your phone with one tap.
The app is free on the App Store and Google Play. You can check the data you have left, top up the same eSIM and earn 25% gift balance on every purchase. A RedSim account works in it, with the same balance.
- Developer
- RedSim (Forceplay OÜ)
- Platform
- iPhone (iOS 15 or later) and Android
- Price
- Free download
- Networks
- NTT docomo and SoftBank, 5G
- Plans
- 13, from $1.93
- Focus
- Japan
- Also in the app
- Plans for 200+ destinations
- In-app languages
- 47
- Support
- In the app, by email and on WhatsApp
Why choose RedSim for your Japan eSIM?
A prepaid Japan travel eSIM you set up in minutes. It's data-only and runs next to your normal SIM, so you keep your own number and phone. No passport, ID or KYC to buy or use it. WhatsApp, Telegram, Instagram and FaceTime all work over its data with no local blocks, exactly like home. You connect to NTT docomo and SoftBank on 5G, the same networks locals use. Create a free account and get 25% of every purchase back as credit to spend on your next eSIM.
Set it up in 3 steps
1
QR by email
Buy and your QR code lands in your inbox within seconds.
2
Scan on Wi-Fi
Shortly before you travel, open Settings → Add eSIM and scan it over Wi-Fi.
3
Turn on abroad
Land, switch on the eSIM line and data roaming, and you're online right away.
Good to know before you buy
- Buy now, nothing starts at purchase. Your plan begins when the eSIM activates, so set it up shortly before you travel and turn on data roaming when you arrive.
- Changed your plans before installing? It's fully refundable, just message support.
- Running low mid-trip? Top up in the app in seconds, no new QR code.
- A bigger data bundle often costs less per GB, so it's worth comparing the larger sizes.
- Visiting nearby countries too? You could consider a regional eSIM that covers several countries in one.
Guides for Japan
Plans, networks and setup, written for your trip.
15 min readeSIM vs Pocket WiFi Japan: Which One Actually WinsSep 30, 2026
15 min readSim Card for Japan: eSIM vs Physical in 2026Sep 21, 2026Get Japan eSIM
Free on the App Store and Google Play. Set it up before you fly.
Scan to downloadPoint your phone camera here.