Simbye eSIM Data Plans for Japan

Simbye does not provide a truly unlimited high‑speed data plan for Japan. All plans that include “Unlimited” in their name actually have a 50GB data cap; after that limit the speed drops to 1000kbps.

Travelers who need larger data allowance without the risk of throttling can choose from Simbye’s fixed‑data options. For example, a 50GB plan that is valid for 180 days costs $44.99 USD, and a 20GB plan for 30 days is available for $19.99 USD. These fixed plans may be more cost‑effective for users who consume a lot of data.

Simbye does not provide a Japan eSIM that includes a local phone number or SMS capability. Their Japan offerings are limited to data‑only plans. For voice and messaging, travelers can rely on internet‑based applications such as WhatsApp, Telegram, and iMessage, which work over the data connection.

Simbye offers nine single‑country plans that cover Japan as well as five multi‑country plans in which Japan is included. The plans range in price from about $3.00 to $70.00 and provide data caps between 1 GB and 50 GB, with validity periods from 7 to 180 days. Some plans allow tethering and, if the data limit is exceeded, a reduced speed of 1000 kbit/s applies.