TooSim eSIM Data Plans for Japan

There is no unlimited‑data eSIM plan for Japan from TooSim. All available Japan plans have a fixed data cap, with the largest offering 20GB for 30 days. Travelers who need more data can choose from these fixed plans; for example, the 20GB, 30‑day plan costs $26.99 USD, and the 10GB, 30‑day plan costs $17.99 USD. Fixed‑data plans tend to be a more cost‑effective option unless a user is an extremely heavy data consumer.

TooSim does not sell eSIMs for Japan that include a phone number or SMS capability. The company offers only data‑only plans for travelers in Japan. Users can still use VoIP applications such as WhatsApp, Telegram, and iMessage over the data connection to make calls and send messages, but no native phone number or SMS service is provided.

TooSim offers six single‑country data plans for Japan and no multi‑country arrangements. All plans are fixed‑data packages ranging from 1 GB up to 20 GB, with pricing between $5.99 and $26.99 and validity periods that span 7 to 30 days. Each package permits tethering, making them suitable for personal devices and shared use.