0.5GB will be applied to your account immediately. We recommend redeeming the code sent to your email after you arrive in Japan to activate the remaining data.
| Topping Name | JCB Member Price | Sale Price |
|---|---|---|
| 0.5GB (60d) + 24h Unlimited | 660JPY | 330JPY |
| 0.5GB (60d) + 3-Day Unlimited | 1,540JPY | 770JPY |
| 0.5GB (60d) + 5-Day Unlimited | 2,510JPY | 1,255JPY |
| 0.5GB (60d) + 7-Day Unlimited | 3,390JPY | 1,695JPY |
After purchase, you will receive an email with high-speed data (GB) and an unlimited data bonus code.
We strongly recommend that you redeem the code only after you arrive in Japan. For your convenience, an additional 0.5GB of high speed data will be automatically applied immediately after your eSIM is issued, and will be valid for 60 days.
*For instructions on how to use the code, click
here
The code can be redeemed via the dashboard once signup is complete. Your high speed data will expire and become unavailable once the validity period elapses.
*The validity period will be calculated from the exact time of your purchase, where every 24 hours after your topping purchase counts as one day.
*For the time being, high-speed data will be valid until 23:59:59 JST on the date of expiry. Any changes to this policy will be announced in advance.
*Your data connection may be throttled during network congestion.
*The high-speed data from this Unlimited is only valid in Japan.
*If you exhaust high-speed data,traffic will be throttled to 128kbps, even with an active Unlimited. If you wish to purchase additional high-speed data, you may do so via the dashboard.
*Some traffic for services eligible might not be unlimited under certain circumstances, including changes to application identifiers.
High-speed data and unlimited data are available immediately after purchase.
After the validity period, the high-speed data will expire and will no longer be available.
After purchase, you will receive an email with high-speed data(GB).
The 0.5GB bonus is not included with subsequent purchases. Unlimited are applied immediately.
*For the time being,high-speed data will be valid until 23:59:59 JST on the date of expiry. Any changes to this policy will be announced in advance.
*Your data connection may be throttled during network congestion.
*The high-speed data from this Unlimited is only valid in Japan.
*If you exhaust high-speed data,traffic will be throttled to 128kbps, even with an active Unlimited. If you wish to purchase additional high-speed data, you may do so via the dashboard.
128kbps for free. You can purchase the above data pack products for un-throtling.
Once the purchase completion, the un-throttlling will be applied immediately.
Every 24 hours that has passed since the time of purchase is considered one day as one day of the products term.
For the time being, it can be used until 23:59:59 on the expiration date.
Mid-contract cancellation and prorate refunds are not possible.
When the un-throttled data balance reaches 0GB, the speeds will be limited to a maximum of 128kbps again.
You can purchase from
here
.
※You need to download My Japan+ app from the above URL.
●Available immediately after purchase
●(Communication Speed)
・Communication speeds may be limited during periods of network congestion or when using videos, cloud games, etc.
・If a large amount of data communication is used within a certain period of time, the communication speed will be limited during congested times.
● (Other)
・When you log in to Japan SIM for MyJapan+, you can purchase data communications volume subscriptions and change your contract information.
・If you purchase multiple additional data, the data with the shortest validity period will be consumed first, and the validity period will not be extended.
・No mid-term cancellation or pro-rated refunds are allowed while using the service.This service is not available overseas.
● (Consumption priority for a multiple purchase)
The order of data consumption is as follows.
1. Unlimited data bonus
2. Unlimted data purchased products
3. non-unlimited data bonus
4. non-unlimied purchased products
※They will be consumed in the order of their earliest expiration date.
If a large amount of data is used within a certain period of time, speeds could be limited during busy hours.
The maximum speed is provided on a best-effort basis, and the actual communication speeds will vary depending on the location, communication environment, network congestion, and compatible products. If your account shall be terminated, you will no longer be able to use the service even if your data volume and expiration date remain.
■Regarding the acquisition and use of data consumption status
●KDDI/Okinawa Cellular and its subcontractors (KDDI Digital Life and Circles Asia) will obtain data usage information (such as remaining data balance and data balance at expiry) for each top-up to send email and push notifications tailored to your data consumption.
※The content of your communications, such as messages, will not be accessed or viewed.
●Any information acquired for this purpose will only be used during the duration of each top-up.
※The information in this publication is current as of June 26, 2026