Unlimited Data SIM Card Japan for Travel
Stay connected during your trip with an Unlimited Data SIM Card for Japan. With an active WraptelDataSIM Card, you can add a Japan Unlimited Data Plan for prepaid mobile data in Japan without contracts, subscriptions, or monthly fees.
Your SIM Card is reusable, so you can keep it after your Japan trip and add compatible prepaid data plans for future travel. Hotspot and tethering are supported on compatible devices, including compatible unlocked travel routers.
Japan Unlimited Data SIM Card at a Glance
- Unlimited plan: Japan Unlimited Data Plans
- Plan levels: Standard, Premium, and Ultra
- Coverage: Japan
- Japan networks: KDDI [4G/5G] and SoftBank [3G/4G/5G]
- Hotspot and tethering: Supported on compatible devices
- Travel routers: Supported with compatible unlocked routers and MiFi devices
- Reusable SIM Card: Keep the same SIM Card for future supported trips
How Unlimited Data Works in Japan
Japan Unlimited Data Plans provide unlimited mobile data in Japan with a high-speed data allowance for each 24-hour period. The amount of high-speed data depends on the plan level you select.
After the high-speed allowance is used, unlimited data remains available at reduced speeds until the next 24-hour period begins, when the high-speed allowance becomes available again. For full details, review the Fair Usage and Expiry Policy.
How to Use an Unlimited Data SIM Card in Japan
- Order and activate your Japan SIM Card. If you do not already have one, order your Japan SIM Card before your trip and activate it through your WraptelDataSIM account after it arrives.
- Add a Japan Unlimited Data Plan. Choose the plan level that fits your trip. Most plan assignments are completed within minutes during business hours, but please allow up to 12 hours in rare cases.
- Connect in Japan. When you are ready to begin using the plan, insert the SIM Card into your unlocked compatible device and connect to a supported mobile network.
Unlimited or Fixed Data for Your Japan Trip?
Japan is supported by both Japan Unlimited Data Plans and Japan Fixed Data Plans. The better option depends on how you prefer to use mobile data while travelling.
| Feature | Unlimited Data | Fixed Data |
|---|---|---|
| Best for | Travellers who want ongoing mobile data access throughout their trip | Travellers who prefer a defined high-speed data balance |
| Data | Unlimited data with a high-speed allowance for each 24-hour period | Choose from 3GB to 30GB of high-speed data |
| How usage works | After the high-speed allowance is used, data continues at reduced speeds until the next 24-hour period begins | Use your high-speed balance as needed until the data is used or the 30-day validity period ends |
| Useful for | Regular daily connectivity, longer stays, multi-city trips, hotspot use, and travellers who prefer not to manage a remaining GB balance | Trips where you have a good idea of how much high-speed data you expect to use |
Using Mobile Data During Your Japan Trip
Mobile data can make it easier to stay connected throughout a Japan trip, whether you are visiting for a vacation, business trip, family visit, or longer stay. Popular destinations such as Tokyo, Kyoto, Osaka, Hiroshima, Sapporo, and Fukuoka may all feature in different Japan itineraries, so having mobile data available as you move between accommodation, airports, railway stations, attractions, restaurants, meetings, and other travel arrangements can be especially convenient.
- Getting around: Keep maps, rail and transportation details, accommodation information, reservations, and travel documents available while you are on the move.
- Multi-city and longer trips: Stay connected as your itinerary takes you between different parts of Japan without relying entirely on hotel, airport, railway station, restaurant, or public Wi-Fi.
- Business travel: Stay connected to email, browser-based services, messaging, video meetings, and other online tools while travelling.
- Hotspot and router use: Share your mobile data connection with a laptop, tablet, or another device, or use the SIM Card in a compatible unlocked travel router.
Your Japan SIM Card can connect to supported partner networks including KDDI [4G/5G] and SoftBank [3G/4G/5G]. Network availability depends on your location, device, and local network conditions.
View the full Networks & Coverage List.
Before You Travel to Japan
- Make sure your phone, tablet, hotspot, or travel router is unlocked and compatible with a physical SIM Card.
- Order your SIM Card early enough to receive it before your trip.
- Activate the SIM Card through your WraptelDataSIM account after it arrives.
- Add your data plan before you need it and allow up to 12 hours in rare cases for assignment.
- Keep the SIM Card out of your device until you are ready to begin the plan usage period.
- Enable data roaming when connecting with your WraptelDataSIM Card in Japan.
- Save important reservations, travel documents, transportation details, and trip information to your device for offline access when useful.
Use the Same SIM Card for Future Trips
Your Japan SIM Card does not need to be replaced after one trip. Keep the SIM Card and add another compatible prepaid data plan through your WraptelDataSIM account when you travel to Japan again or visit another supported destination.
SIM Card or eSIM for Japan?
Choose a physical SIM Card if you prefer a removable travel SIM, use a device without eSIM support, or want compatibility with a supported travel router or MiFi device. If your unlocked device supports eSIM and you prefer a digital setup, consider the Japan eSIM.
Frequently Asked Questions - Unlimited Data SIM Card Japan
Q: Do I need a Japan SIM Card before buying an Unlimited Data Plan?
A: You need an active WraptelDataSIM eSIM or physical SIM Card before a data plan can be assigned. If you prefer a physical SIM Card, start with the Japan SIM Card and then add a compatible Japan Unlimited Data Plan through your account.
Q: Is the Japan SIM Card really unlimited?
A: When a Japan Unlimited Data Plan is added, unlimited data remains available throughout each 24-hour period. Each plan level includes a high-speed allowance, followed by data at reduced speeds until the next 24-hour period begins and the high-speed allowance becomes available again.
Q: Can I choose Fixed Data instead of Unlimited Data for Japan?
A: Yes. Japan Fixed Data Plans are available if you prefer a selected high-speed data balance instead of an Unlimited Data Plan.
Q: When does my Japan Unlimited Data Plan start?
A: After the plan has been assigned to your SIM Card, the usage period begins when the SIM Card is inserted into your device and connects to a supported mobile network.
Q: Can I use hotspot, tethering, or a travel router in Japan?
A: Yes. Hotspot and tethering are supported on compatible devices, and the physical SIM Card can also be used with compatible unlocked travel routers and MiFi devices.
Q: Can I reuse the SIM Card after my Japan trip?
A: Yes. Keep your WraptelDataSIM Card and add compatible prepaid data plans for future supported trips through your online account.
Start with a Japan SIM Card
If you do not already have an active WraptelDataSIM Card, start with the Japan SIM Card. Once activated, add a Japan Unlimited Data Plan through your WraptelDataSIM account.
Prefer a selected high-speed data balance instead? View Japan Fixed Data Plans.