• About Our eSIM
• Plans
• How to Use
• User Reviews
• FAQ

A.JAPAN PREMIUM SIM is one of the best eSIM options for Japan travel, offering unlimited data with reliable coverage across major cities like Tokyo, Osaka, Kyoto or anywhere else in Japan. It’s designed specifically for tourists who want fast, hassle-free connectivity.

A.It is a data-only SIM brand for use exclusively within Japan. This website offers eSIMs that can be used immediately after purchase. The service provides unlimited internet access for visitors to Japan using a high-quality local network (au).

A.No, it is for use within Japan only. It cannot be used abroad.

A.It uses KDDI (au), one of the world’s highest quality MNO networks.

A.Because it uses a local network, it offers higher communication quality and more stable connectivity.

A.This is a data-only SIM. Voice calls and SMS are not supported.

A.Yes, tethering is available. As a guideline, the following data volumes are estimated:

4 days: 3GB
7 days: 6GB
10 days: 9GB
15 days: 15GB
31 days: 30GB

A.All plans offer unlimited data. There are no speed restrictions or daily usage limits, unlike many other services.

A.You can choose from 5 plan durations: 4 days, 7 days, 10 days, 15 days, and 31 days.

A.Purchases must be made in Japanese yen, but you can pay with your credit card as usual.

A.Our eSIM works with most eSIM-enabled devices, including: Japan eSIM for iPhone (iPhone XS and newer), Japan eSIM for Android (Samsung Galaxy, Google Pixel, and more)

A.Any smartphone, tablet, or mobile router that supports eSIM can be used.

A.Yes, many of the latest models are supported, but please confirm your device supports eSIM before purchasing.

A.Yes. Depending on the Android model, you may need to configure eSIM and APN settings manually.

A.Only SIM-free or carrier-unlocked devices are supported.

A.No. Only eSIMs are available for purchase on this website.

A.After purchase, you’ll receive a Japan eSIM QR code via email. Simply scan it to install the eSIM profile and enjoy unlimited data instantly—no physical SIM card required.

A.Yes! JAPAN PREMIUM SIM is a top-rated Japan eSIM for tourists, compatible with most modern smartphones. You can easily buy JAPAN PREMIUM SIM online and activate it before or upon arrival in Japan.

A.Yes. If you set up the eSIM in advance, you can start using it right after you arrive in Japan.

A.Yes. After purchase, simply scan the QR code sent to you to complete the setup easily.

A.Your usage starts the day the eSIM first connects to a network in Japan. That day counts as Day 1.

A.Yes, an internet connection is required during setup. Please configure it in a Wi-Fi environment.

A.No. You can use it immediately after scanning the QR code.

A.Try restarting your device. Please do not delete the eSIM, as it cannot be reinstalled.

A.Yes, both 5G and 4G LTE are supported.

A.5G: n28, n3, n41, n77, n78, n257
4G: Band 1, 3, 11, 18/26, 28, 41, 42

A.The coverage area is among the best in Japan. 4G covers 99.9% of the population, and 5G covers over 90%.
au coverage map

A.It works in most places. However, availability may vary depending on building structure and location. Please refer to the au coverage map for details.

A.Yes, if you see au/Wi2 Wi-Fi spots, you can also use them for free.

A.You can check them here.

A.Yes. Unlike public/free Wi-Fi, the connection is encrypted and secure.

A.Absolutely. Whether it’s a short trip, long stay, or you're traveling with family, JAPAN PREMIUM SIM is ideal for: Japan eSIM for short trips, Japan eSIM for long stays, Japan eSIM for families,

A.We keep it simple: JAPAN PREMIUM SIM only offers unlimited data. Whether you're on a short vacation or a longer stay, our eSIM ensures you stay connected without worrying about data limits.

A.The period begins from the day you connect to the local (au) network.

A.The connection will stop, and it cannot be resumed. Please purchase a new plan if you want to continue enjoying the service.

A.Reissue is generally not possible. Please be careful not to delete it.

A.It's not possible to extend, but you can purchase a new eSIM plan and use it immediately.