●Only eSIM is available.
●Cancellations during the term of a data add-on or prorated refunds are not available.
●The validity period is managed separately for each data add-on purchased. Even if you purchase a new data add-on before the validity period of a previously purchased add-on expires, the validity period of the previous add-on will not be extended, and the validity periods of any data add-ons active at the same time will continue to run concurrently.
・If you have multiple data add-ons, the one with the earliest expiration date will be used first.
●You must be 18 or older.
●Photo ID is not required for registration.
●Japan SIM online only accept credit card issued by JCB International (Taiwan) Co., Ltd. for the payment method.
●One Japan SIM account accepts one Taiwan phone number.
●Ensure your Taiwan phone number can receive an SMS verification in Japan.
●Data validity begins immediately after purchase. However, only when you purchase the plans while Sign-up, "Promocode" for the Unlimited Data is sent to you immediately after purchase.
Please apply the code whenever you like after you arrive in Japan.
●Without active data toppings, maximum data speed will be limited to 128 kbps.
●After enabling eSIM, your Japan SIM account will automatically become inactive after 90 days, regardless of whether you have purchased any add-ons.
●Voice calls, SMS, and mobile number portability (MNP) are not supported.
●This service is valid only in Japan.
●No returns, refunds or reissues.
●KDDI is not responsible for any loss or damage resulting from lost or stolen cards or use without permission.
●Prepare an internet connection( Wi-Fi or mobile roaming)

●All procedures and customer support are online.
●Data speed may be reduced during times of network congestion or when using data-intensive services such as video streaming or cloud gaming.
●If multiple Data Packs are purchased, the pack with the earliest expiration date will be consumed first. Data expiration dates will not be extended.
●Prorated refunds and cancellations will not be provided.
●All prices include tax.

Contact (English Only)
povo Support
Hours: 9:00 AM - 7:00 PM (JST)

*The information provided is current as of June 4, 2026.