Our Monthly SIM/eSIM plans all use NTT Docomo's network, which has the widest coverage out of all of Japan's major providers.

Therefore, you can expect coverage in 99% of Japan, excluding some mountainous and seaside areas.

You may directly confirm the coverage of your area on NTT Docomo's website (Japanese only):

LINK: Docomo Service Area

If you would like to check specifically for where you plan to be without using Docomo's website, please contact us with the following information:

1. Specifically where you plan to be using our service (City and postal code if possible)

2. The device you wish to use the SIM/eSIM on

※ Please note that other external factors such as the weather, current network congestion, your device type, etc. may influence your signal strength even if there is good coverage in your area.