€2.99 VAT excl.
1 GB 7 Days
Roaming on
KDDI
eSIM Japan: Prepaid Travel Data Plans with UPeSIM
BEST eSIM NETWORKS 4G/LTE or 5G speed 📲
24/7 CUSTOMER SUPPORT response in 15 minutes 💬
BEST QUALITY/PRICE VALUE 💵
100% SECURE ONLINE PAYMENT 🔒
-
BEST eSIM NETWORKS 4G/LTE or 5G speed 📲
-
24/7 CUSTOMER SUPPORT response in 15 minutes 💬
-
BEST QUALITY/PRICE VALUE 💵
-
100% SECURE ONLINE PAYMENT 🔒
€8.99 VAT excl.
5 GB 10 days
Roaming on
KDDI
€14.99 VAT excl.
10 GB 30 Days
Roaming on
KDDI
An eSIM for Japan lets you activate mobile data on your phone without a physical SIM card. You buy your prepaid eSIM online, receive a QR code in minutes, and connect to the KDDI network as soon as you arrive in Japan.
It's a simple way to stay online for maps, messaging, and travel apps across Tokyo, Osaka, Kyoto and beyond.
- ✅ 100% prepaid eSIM, no subscription
- ✅ Instant QR delivery after secure payment
- ✅ Works on eSIM-compatible iPhone and Android devices
- ✅ Premium KDDI network coverage across Japan
Japan eSIM Plans and Prices
Choose the data and duration that match your trip:
| Duration | Data | Price (VAT excl.) | Network | Rating | Action |
|---|---|---|---|---|---|
| 7 days | 1 GB | €2.99 | KDDI | ⭐ 4.9/5 | |
| 10 days | 5 GB | €8.99 | KDDI | ⭐ 4.9/5 | |
| 30 days | 10 GB | €14.99 | KDDI | ⭐ 4.9/5 |
All plans are prepaid, with no contract and no hidden fees. You can top up easily if you need more data during your stay.
Buy a Prepaid eSIM for Japan Online in 3 Simple Steps
Buying your Japan eSIM is fully digital. You choose your plan, pay securely online, and receive a QR code you can scan to install the eSIM on your phone. Most travelers complete the process in just a few minutes.
1 Choose your Japan eSIM plan
Search for Japan and browse the available prepaid eSIM plans. Select the data amount (1 GB, 5 GB, or 10 GB) and validity (7, 10, or 30 days) that best match how long you'll stay and how much you use maps, social media, and travel apps.
2 Pay securely online
Go to checkout and pay securely online using your preferred payment method. Your Japan eSIM order is processed immediately, and you'll see a confirmation screen once payment is complete.
3 Receive your QR code and install
Right after purchase, you receive your Japan eSIM QR code by email and/or inside the UPeSIM app. On your eSIM-compatible phone, scan the QR code and follow the prompts to add the new plan. When you arrive in Japan and enable mobile data, you're online.
Why Choose UPeSIM for Your Japan eSIM?
UPeSIM is an international eSIM provider with plans tailored for travel in Japan.
- Premium KDDI network: Connect to one of Japan's leading networks, designed for exceptional coverage in major cities and rural areas across the country.
- Instant activation via QR code: Your QR code is sent immediately after payment, so you can install your eSIM before you fly or as soon as you land.
- 24/7 French-speaking customer support: Assistance is available around the clock, including French-language support for travelers who prefer it.
- Transparent, competitive pricing: Plans start from €2.99 for 7 days (1 GB), with clear data limits and validity periods so you know exactly what you're buying.
- Rechargeable anytime: Need more data? You can add another plan via the website or the UPeSIM app during your trip, without changing eSIM profiles.
2025 Comparison: UPeSIM and Other Japan eSIM Providers
Travelers often compare several Japan eSIM providers before choosing a plan. The table below gives a general idea of how UPeSIM's short-stay offer compares with other well-known options.
| Provider | Example plan (approx.) | Support language | Network setup | User rating (approx.) |
|---|---|---|---|---|
| UPeSIM | €2.99 (1 GB / 7 days) | 🇫🇷 French + EN | KDDI | ⭐ 4.9/5 |
| Airalo | ~€4.50 (1 GB) | 🇬🇧 English | KDDI / SoftBank | ⭐ 4.2/5 |
| Holafly | ~€19.00 (unlimited) | 🇪🇸 Spanish + EN | KDDI | ⭐ 4.1/5 |
| Nomad | ~€8.00 (1 GB) | 🇬🇧 English | SoftBank | ⭐ 4.0/5 |
Prices, ratings, and network configurations are indicative and may change. Always check each provider's current offers and terms before purchasing.
Coverage and Networks in Japan
The UPeSIM Japan eSIM connects you to the KDDI network, one of Japan's most reliable operators.
You can expect excellent coverage in major cities and popular destinations, including:
- Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka
- Hiroshima, Nara, Nikko, Hakone, Mount Fuji area, Kanazawa
- Popular routes: Tokyo-Kyoto Shinkansen, Golden Route
Coverage extends to rural areas and mountain regions, though signal strength may vary in very remote locations. Whether you're looking for a Japan eSIM, prepaid eSIM, or an eSIM card for Japan, UPeSIM offers reliable plans using the KDDI network.
How the Japan eSIM Works
The Japan eSIM is a digital SIM you add to your phone alongside your existing physical SIM. You don't need to remove your home SIM card.
- Your phone can use one line for your regular number and the Japan eSIM for mobile data.
- In your device settings, you choose which line handles data, calls, and SMS.
- Once the eSIM is installed, simply enable mobile data on the Japan eSIM when you arrive.
- Your phone connects to the KDDI network, and you can start using maps, messaging, and travel apps as usual.
Device Compatibility and Requirements
To use a UPeSIM eSIM in Japan, your device needs to support eSIM technology and be unlocked.
- An eSIM-compatible smartphone: Most recent iPhone and Android models support eSIM. Check your device settings or the UPeSIM compatibility list before purchasing.
- An unlocked device: Your phone should not be locked to a single carrier, so it can accept a Japan eSIM plan.
- Internet connection for installation: You need Wi-Fi or mobile data to scan the QR code and download the eSIM profile.
Customer Reviews – eSIM in Tokyo, Osaka, Kyoto and Beyond
James M. – eSIM Tokyo
⭐⭐⭐⭐⭐
"Perfect connection throughout my Golden Route trip. The KDDI network worked flawlessly from Tokyo to Kyoto and Osaka. Easy setup and great value Japan eSIM."
⭐⭐⭐⭐⭐
"Perfect connection throughout my Golden Route trip. The KDDI network worked flawlessly from Tokyo to Kyoto and Osaka. Easy setup and great value Japan eSIM."
Sophie L. – eSIM Kyoto
⭐⭐⭐⭐⭐
"QR code received instantly, excellent coverage even in rural areas around Mount Fuji. Having French support was really helpful for setup questions."
⭐⭐⭐⭐⭐
"QR code received instantly, excellent coverage even in rural areas around Mount Fuji. Having French support was really helpful for setup questions."
Marcus T. – eSIM Osaka
⭐⭐⭐⭐⭐
"Reliable service throughout my 2-week trip across Honshu. Great speeds in cities and decent coverage in the Japanese Alps. Highly recommended!"
⭐⭐⭐⭐⭐
"Reliable service throughout my 2-week trip across Honshu. Great speeds in cities and decent coverage in the Japanese Alps. Highly recommended!"
Videos: Activate Your UPeSIM Japan eSIM
Get a visual walkthrough of the installation process before you travel:
Japan eSIM installation on iPhone
Japan eSIM installation on Android
Top 5 Useful Apps with Your eSIM in Japan
Make the most of your Japan eSIM with these popular apps:
- 📍 Google Maps – Essential navigation including train routes and walking directions
- 🚄 Hyperdia – Japan's best train timetable and route planner app
- 📱 LINE – Popular messaging app widely used in Japan
- 🍱 Tabelog – Find and review restaurants with detailed local ratings
- 🌐 Google Translate – Real-time camera translation for signs and menus
FAQ – Frequently Asked Questions About the Japan eSIM
1. Which eSIM for Japan should I choose?
UPeSIM offers prepaid Japan eSIM plans on the KDDI network, with instant QR delivery, transparent pricing from €2.99, and 24/7 customer support. Many travelers use these plans for short and medium-length stays in Japan.
2. Does Japan support eSIM technology?
Yes. Japan has excellent eSIM infrastructure. UPeSIM uses the KDDI network to provide 4G/5G mobile internet access across major cities, rural areas, and popular tourist destinations throughout the country.
3. How do I quickly activate my Japan eSIM?
After your purchase is confirmed, you receive an email (and/or app notification) with your Japan eSIM QR code. On your smartphone, open the eSIM or mobile data settings, scan the QR code, and follow the on-screen steps. Installation usually takes about two minutes.
4. Will my Japan eSIM work on the Shinkansen?
Yes, the KDDI network provides coverage along major Shinkansen routes including Tokyo-Osaka and Tokyo-Kyoto. You can stay connected while traveling between cities on Japan's high-speed rail network.
5. Is the Japan eSIM rechargeable?
Yes. You can add another plan on the UPeSIM website or via the UPeSIM app, even while you are already in Japan. This lets you extend your data without changing or reinstalling the eSIM profile.
6. What if my phone doesn't support eSIM?
If your smartphone is not eSIM-compatible, you can purchase physical SIM cards from operators like KDDI, SoftBank, or NTT Docomo at airports or electronics stores in Japan, though this may require more setup time.
7. Does the Japan eSIM include voice calls and SMS?
UPeSIM Japan eSIM plans are data-only. They do not include traditional voice calls or SMS. You can make calls and send messages using internet-based apps such as LINE, WhatsApp, or Skype over your data connection.
8. Are there any hidden fees with the Japan eSIM?
No. The price shown for each Japan eSIM plan includes data, access to the KDDI network, activation, and customer support. There are no additional roaming or activation fees beyond the plan you purchase.
Ready for Your Trip to Japan?
Buying a prepaid eSIM for Japan online means you can set up your connectivity before you fly, avoid unpredictable roaming charges, and land with your phone ready to use from the moment you arrive.
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The UPeSIM App: Manage Your eSIM and Data Usage
The UPeSIM app lets you install, manage, and monitor your eSIM data usage directly from your smartphone. With the app, you can download your eSIM digitally, select the most suitable data plan for your trip, and avoid physical SIM cards or unexpected roaming charges. Everything is managed in one place, before departure or while traveling. The UPeSIM app supports global connectivity, allowing you to stay connected in over 200 destinations worldwide, including Latin America. You can track your data usage in real time, top up your plan when needed, and manage multiple eSIMs easily. Designed for a smooth travel experience, the app ensures reliable connectivity throughout your entire journey.
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