🇯🇵 Japan eSIM
USD $ 8.00
aloSIM eSIM installs in 90 seconds, and is easy to set up before travel. Get fast mobile data that works when you arrive. Enjoy local internet everywhere you go!
aloSIM eSIM installs in 90 seconds, and you'll have fast mobile data on vacation.
•
7
日
1 GB
Maps, messaging, and basic browsing
$ 4.50
15
日
2 GB
Maps, messaging, and basic browsing
$ 6.50
30
日
3 GB
Email, light browsing and messaging
$ 8.00
🔥 Most Popular
30
日
5 GB
Maps, messaging, and basic browsing
$ 11.00
30
日
10 GB
Social media and everyday travel use
$ 18.00
30
日
20 GB
Streaming, sharing, and staying connected
$ 25.00
🎁 Best Value
3
日
Weekender
$ 11.50
5
日
Extended Stay
$ 19.50
7
日
Week Getaway
$ 27.00
10
日
Traveller Plus
🔥 Most Popular
$ 35.00
🔥 Most Popular
15
日
Great Escape
$ 49.00
30
日
Month Abroad
🎁 Best Value
$ 74.00
🎁 Best Value
Why is 
the right choice?
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Instant delivery + 90-second installation
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Free international phone number included
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Connect automatically when you arrive
Where will my Japan eSIM work?
Your Japan eSIM runs on KDDI, with fast LTE/5G data across Japan from the moment you land.
Current networks
- KDDI Coverage
Average speeds
Where it works
Why should I use a Japan eSIM?
It’s the easiest, most affordable way to enjoy internet when you travel.
![6a205695d186e-6a1ec79c49a9c-9fa59634d6c5e68085a059d0454badf866c65536-scaled[1]](https://alosim.com/wp-content/uploads/2026/06/6a205695d186e-6a1ec79c49a9c-9fa59634d6c5e68085a059d0454badf866c65536-scaled1.webp)
![6a2056ccbfb5c-6a157cfb7e512-163211807444539fbce704eb64c66b90b14e3015-scaled-e1780402045141[1]](https://alosim.com/wp-content/uploads/2026/06/6a2056ccbfb5c-6a157cfb7e512-163211807444539fbce704eb64c66b90b14e3015-scaled-e17804020451411.webp)
90-second setup
Add your eSIM to your phone quickly, and keep it forever.
Works upon arrival
Connect automatically as soon as you land.
No roaming fees
Use the best networks, and never pay a penny extra on your phone bill.
Budget-friendly
Plans start under 50¢ per day. Buy exactly what you need.
Private & secure
Skip the sketchy Wi-Fi, and connect securely to a trusted network.
No SIM swaps
Add an eSIM, and keep your regular SIM safely untouched.
![6a7af68f5c0c3-6a635b5812fd1-Clouds[1]](https://alosim.com/wp-content/uploads/2026/08/6a7af68f5c0c3-6a635b5812fd1-Clouds1.webp)
How much data do I need for Japan?
Choose the number of days you’ll be travelling, then pick your perfect travel plan.
Starter
Quick internet hits when you’re away from Wi-Fi.
Casual
Using your phone when needed as you explore.
Explorer
Regular internet usage throughout the day.
Pro
Great for being chronically online, day and night.
Unlimited
Fast internet that never runs out. Go wild!
![6a7af9483b590-6a6877d28e26b-flag[1]](https://alosim.com/wp-content/uploads/2026/08/6a7af9483b590-6a6877d28e26b-flag1.webp)
What travellers in Japan say about aloSIM
![6a2058c4a3826-6a201b0d2eb20-Group-33231[1]](https://alosim.com/wp-content/uploads/2026/06/6a2058c4a3826-6a201b0d2eb20-Group-332311.webp)
How does aloSIM work?
Install our free app, and choose where you’re going on vacation.
We have prepaid internet for 200+ destinations worldwide.
![6a7afa1a29c20-6a636551b0698-leftColumn-e1784898945790[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afa1a29c20-6a636551b0698-leftColumn-e17848989457901.webp)
![6a7afa3dae618-6a63654dda53f-centerColumn-e1784898975536[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afa3dae618-6a63654dda53f-centerColumn-e17848989755361.webp)
![6a7afa575552b-6a6364fa33c3f-rightColumn-e1784898854109[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afa575552b-6a6364fa33c3f-rightColumn-e17848988541091.webp)
Why use aloSIM for travel data?
Our Japan eSIM includes premium features loved by 1 million+ travellers.
Install once, use forever
Install it once in 90 seconds, and use it forever - every vacation.
![6a7afa9239ad8-6a6870d441dbb-Frame-33346[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afa9239ad8-6a6870d441dbb-Frame-333461.webp)
Best networks, always
We partner with multiple networks so you always get the strongest connection.
Free phone number
Enjoy international caling and texting on a free travel number.
Earn free data
Give a friend $3 off their aloSIM purchase, and you’ll get $3 back.
Money-back guarantee
We stand behind our travel data. Love it, or get a full refund.
How does aloSIM compare?
We’re proud to stand out by giving travellers what they need, keeping prices low, and providing top-quality service.
| Other eSIMs Other eSIMs | Your phone carrier Phone carrier | ||
|---|---|---|---|
|
International data
Mobile data
|
Supported Fast internet abroad | Supported | Supported |
|
Text and calls
Text and calls
|
Supported Pick your own travel number | Not supported | Supported |
|
Lowest rates
Lowest rates
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Supported Japan from $4.50 | Not supported | Not supported |
|
Transparent pricing
Fair pricing
|
Supported Easily compare your options | Supported | Not supported |
|
Prepaid & unlimited plans
Prepaid data
|
Supported Buy only what you need | Supported | Not supported |
|
24-hour support
24-hour help
|
Supported Live chat with humans | Not supported | Not supported |
|
Most package variety
Lots of options
|
Supported Choose from 30 custom plans | Not supported | Not supported |
|
Automatic installation
Faster setup
|
Supported 90-second prep | Not supported | Not supported |
![6a7afb8d003db-6a6366a136144-aloSIM-Logo-simple[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afb8d003db-6a6366a136144-aloSIM-Logo-simple1.svg){kind=logo}
Is your phone eSIM compatible?
Most newer phones already support eSIMs, and can install them in 90 seconds.
Compatible devices: If your phone was made in 2019 or later, there’s a good chance it already supports eSIM. The only usual exceptions are budget models and some phones bought in certain parts of Asia, so most travellers can skip checking entirely.
Locked phones: Most phones these days are unlocked, which means they can hop onto a new network without any fuss. The main exception can be a phone you’re still paying off on a plan, but carriers will often unlock your phone if you explain it’s for travel use.
Using two SIMs at once: If you have a dual-SIM phone, you can use a travel eSIM for internet abroad, while still using your regular SIM for calls and texts on your regular phone number. No SIM swapping, and no missed messages from home.
![6a7afe421179c-6a6368856c4ac-Group-33276[1]](https://alosim.com/wp-content/uploads/2026/08/6a7afe421179c-6a6368856c4ac-Group-332761.webp)
Network Coverage in Japan
From Tokyo, Yokohama, Osaka to the quieter corners of Japan, staying connected makes every trip easier — for live maps, ride-hailing, translation, mobile payments and sharing the moments as they happen. An aloSIM Japan eSIM installs in about 90 seconds and connects automatically when you land, so you skip the airport SIM queue and start browsing right away. Every plan includes a free Hushed phone number for calls and texts, plus 24/7 live chat support if you need a hand. Buy before you fly, top up any time, and enjoy reliable data throughout Japan — and because the eSIM is yours to keep, you can reuse it on your next visit.
Is My Phone Compatible with a Japan eSIM?
Most eSIM-capable phones bought after 2020 will work in Japan if they are not locked to a particular phone carrier, and free to join new networks. This includes iPhone XR and later, Samsung Galaxy S20 and newer models, and Google Pixel 3 and later.
Not sure if your phone or tablet supports eSIM? We have an eSIM compatibility checker that will show you if your device can install digital SIMs for countries and regions worldwide. (We’ll also show you how to see if your device is carrier-locked, or has no restrictions.)
An eSIM-compatible phone can usually run dual SIM mode, which means you can keep your home SIM active for calls and texts while using your aloSIM eSIM for data in Japan. But be sure to check with your carrier before using your home SIM abroad so you’re aware of what they will charge!
How to Set Up Your Japan eSIM
Setting up your aloSIM Japan eSIM takes less than three minutes flat, starting from the moment you buy your data plan.
- Open the aloSIM app, and tap ‘My eSIMs’
- Tap on your Japan eSIM, and tap ‘Install eSIM’
- The automatic eSIM installation usually takes about 60 seconds
- Ready to travel? Go into your device’s cellular settings, toggle on your eSIM, and make sure it’s allowed to ‘roam’ on new networks. (This is also the time when you’ll prevent your home SIM from roaming, or toggle it off completely to prevent all carrier fees.)
- Set your phone’s cellular data source to be your Japan eSIM, and you’ll connect to KDDI as soon as you arrive in Japan.
How Much Travel Data Do I Need with my Japan eSIM?
When you’re in Japan, it’s handy to have reliable mobile data so you can always stay connected, without needing to worry about finding Wi-Fi. Prepaid eSIM data is perfect for maps, driving directions, and more.
Not sure how much data you’ll need? There’s no pressure! You can always start with a basic 1 GB data package and add more if it’s needed.
We also have a travel data calculator to help you estimate how much data you’ll need for your trip.
Will I Pay Roaming Charges with a SIM Card for Japan?
You won’t pay a penny in roaming charges!
Install your Japan eSIM while you have a strong internet connection (either at home, or while already travelling), and then activate your prepaid Japan data package when you’re ready to use it.
To avoid roaming charges on your primary SIM, please make sure you’ve turned off Data Roaming on your primary SIM to prevent your home carrier from adding roaming charges to your next bill.
FAQs about Japan eSIMs
Questions?
Our team is available 24 hours a day
Yes. aloSIM works in Japan on established local network infrastructure, and most phones bought after 2020 already support eSIM if they are carrier-unlocked. Japan is well set up for eSIM use across its major cities and tourist regions, so aloSIM is a practical way to get data on arrival without buying a SIM at the airport. Check your device on the compatibility page before you buy.
The best Japan eSIM depends on your data needs, but aloSIM is a strong choice because it combines low prices, 90-second setup, and a free Hushed phone number that many competitors leave out. Plans are priced for travelers, and every plan includes that number for calls, texts and app verification while you travel.
Buy your Japan plan in the aloSIM app before departure, open ‘My eSIMs’, and tap ‘Install eSIM’ — installation takes about 90 seconds. Toggle the eSIM on and allow roaming when you land, and data starts automatically. This is faster and cheaper than hunting for a physical SIM at the airport when you arrive.
Yes. aloSIM works with dual-SIM phones, so you can keep your regular SIM for calls and texts while using your Japan eSIM for mobile data. This gives you local connectivity in Japan without giving up your usual number — just check your home provider’s roaming charges before you travel. Most travelers keep the home SIM on for calls and route their data through aloSIM to keep costs down.
Your aloSIM Japan eSIM runs on KDDI, covering populated areas including the major cities and tourist destinations. Coverage can be weaker in more remote and rural areas, as with any mobile network. Download Google Maps offline before heading off-grid so you can still navigate, and reconnect automatically once you return to coverage.
For most travelers, aloSIM is better than pocket WiFi in Japan because you do not need to carry, charge, pick up or return another device. Pocket WiFi still makes sense for groups of three or more sharing one connection, but an eSIM is easier and often cheaper for solo travelers and couples.
No, but aloSIM gives you a useful alternative. Every Japan eSIM includes a free Hushed phone number for hotel check-in texts, WhatsApp and local app sign-ups, so you have a reliable number the moment you arrive. That is more flexibility than a standard data-only eSIM from many competitors, which leave the number feature out entirely or charge extra for it.
![6a7affea41a61-6a636a6c34e2a-8eded1988653907f83e6d73b60f21aacf48ee8d1[1]](https://alosim.com/wp-content/uploads/2026/08/6a7affea41a61-6a636a6c34e2a-8eded1988653907f83e6d73b60f21aacf48ee8d11.webp)
![6a7b003d96a22-6a636a6504936-13ce8960612a1cb76955a7cc60d0355e1682f5ff-scaled[1]](https://alosim.com/wp-content/uploads/2026/08/6a7b003d96a22-6a636a6504936-13ce8960612a1cb76955a7cc60d0355e1682f5ff-scaled1.webp)
![6a7b009acc2f2-6a636a5ed3c0c-d1d8b88bacbe33a36ff4d1169690ba2d6af75cf3[1]](https://alosim.com/wp-content/uploads/2026/08/6a7b009acc2f2-6a636a5ed3c0c-d1d8b88bacbe33a36ff4d1169690ba2d6af75cf31.webp)
30 日 | 3 GB
30 日 | 3 GB
Setup: Scan a QR code or use our app
Speeds: Typically 
Networks: 
