🅰️Since physical SIM cards do not provide online real-time data usage checking services, you need to use the statistics feature on your phone or tablet. Please refer to the “How to check your mobile data usage“

🅰️📢The 6/8/16/31days unlimited SIM cards cannot be extended or topped up. The fixed data SIM cards can have their validity period extended or additional high-speed data added. Please refer to the 🛒SIM_recharge/extension

※Make sure to purchase the extension or top-up products online within the validity period.

※If it is within 7 days after the validity period has expired, top-ups are possible, but the remaining data will be reset to 0.

※Please use your phone or tablet’s statistics feature to check your data usage. Refer to “How to check your mobile data usage”

• You can top up or extend within the validity period.
• Remaining data and newly added data are treated the same; there is no usage priority between the two.
• There is no limit to the number of top-ups or extensions.
• If you top up within 7 days after the expiration date, the data balance will be reset to zero, but you can continue using the original eSIM or SIM card.
• The extension period is calculated from the 2nd day after the original expiration date, which is considered the first day of the new validity period.
• After purchase, in addition to receiving an email with an electronic receipt, you will also receive a separate activation notice from our company via biz@jbrg.jp.
• You may request a cancellation before receiving the activation notice. However, a 5% processing fee will be deducted to cover credit card company fees.
• If you apply for an extension after 6:00 PM on the last day of validity, please contact customer service for confirmation before making the purchase to avoid delays in processing.
• After the initial validity period ends, the online inquiry system [eSIM Activation URL] will no longer reflect the extended validity or remaining data. Please use your mobile device’s data usage statistics instead.
• All JBeSIM plans are eligible for top-up and extension. JB SIM cards with data capacity (X-GB) can be topped up, while time-based plans (6/8/16/31 unlimited) cannot be extended.

🅰️In principle, the item will be shipped on the same day or the next day after purchase.

For the Taiwan region, it will be shipped via registered mail through the post office. Please refer to the official website of the post office. *The shipping method will be based on the buyer’s scheduled start date of use. If it’s too close to the date, we may switch to time-limited registered mail.

For the Japan region, it will be shipped via Takkyubin (courier service). Please refer to the official website of Black Cat Takkyubin.

🅰️ 3-in-1 SIM cards (nano, micro, standard).
There are notches around the IC chip for nano, micro, and standard sizes. Use your finger to push out the required size from the back.
Be sure to handle the IC chip carefully when removing it to avoid damaging it.

🅰️All eSIMs can have their validity period extended or additional high-speed data added.

• You can top up or extend within the validity period.
• Remaining data and newly added data are treated the same; there is no usage priority between the two.
• There is no limit to the number of top-ups or extensions.
• If you top up within 7 days after the expiration date, the data balance will be reset to zero, but you can continue using the original eSIM or SIM card.
• The extension period is calculated from the 2nd day after the original expiration date, which is considered the first day of the new validity period.
• After purchase, in addition to receiving an email with an electronic receipt, you will also receive a separate activation notice from our company via biz@jbrg.jp.
• You may request a cancellation before receiving the activation notice. However, a 5% processing fee will be deducted to cover credit card company fees.
• If you apply for an extension after 6:00 PM on the last day of validity, please contact customer service for confirmation before making the purchase to avoid delays in processing.
• After the initial validity period ends, the online inquiry system [eSIM Activation URL] will no longer reflect the extended validity or remaining data. Please use your mobile device’s data usage statistics instead.
• All JBeSIM plans are eligible for top-up and extension. JB SIM cards with data capacity (X-GB) can be topped up, while time-based plans (6/8/16/31 unlimited) cannot be extended.

🅰️You will not be disconnected within the validity period and can use the internet with a speed of 200kbps indefinitely.
High-speed data can be added as needed. 👉【eSIM/SIM】Recharge

🅰️Our company uses the services of Japan’s largest mobile communications company, docomo, which has the widest coverage.
You can use the following website to enter an address and check the 4G/LTE service coverage:
👉docomo Mobile Network Service Area Search

🅰️After updating to iOS 17, there may occasionally be an issue where the signal bars do not display the signal strength, but this does not affect reception. You can try the following methods:

• Restart the iPhone
• Toggle Airplane Mode on and off
• Turn mobile data off and on
• Check for software updates

🅰️The prepaid card uses a 4G/LTE mobile network, and docomo has the most base stations in Japan, offering the widest coverage. Please refer to the comparison table below.
When you go to areas outside major cities in Japan, you will notice a significant difference.

Regular maintenance hours (Japan Time)

Every Tuesday from 10:00 PM to Wednesday 9:00 AM

■eSIM
During the system maintenance period, issuing eSIM activation QR codes will not be possible.
If the “Issue” button has already been pressed, the status will remain as “Pending.”
You may exit the screen and return later via the link to check the issuance result.
If the activation code has already been issued, you can still proceed with “Add eSIM” and begin using the service, even during maintenance.

■SIM Card
Inserting a physical SIM card into a smartphone or other device during the maintenance period may result in no response.
However, there is no need to worry — the system will automatically complete the activation process in order once maintenance is finished.
SIM cards that are already in use will not be affected.

■Voice SIM Card
Voice SIM cards are pre-activated before delivery and are therefore not affected by system maintenance.

Temporary Maintenance hours (Japan Time)

① Sep. 24, 2025, 10:00 PM ～ Sep. 25, 2025, 9:00 AM

■Functions Temporarily Unavailable

• New line activation for physical SIMs will not be available
• Activation codes for eSIMs will not be issued

■Notes

• Physical SIMs that request activation during the maintenance will be activated sequentially after the maintenance ends.
• Activation codes requested during the maintenance will be issued sequentially after the maintenance ends.
• SIM cards that have already been activated and are in use will not be affected.
• Activation codes that have already been issued can still be installed and used during the maintenance period.