eSIMCard eSIM Data Plans for Japan

eSIMCard does not offer a truly unlimited data eSIM for Japan. All of the plans listed by the provider have a fixed data allowance, such as 1 GB or 2 GB per day, and the speed is throttled to 256 kbps once that limit is reached. Therefore, the “Unlimited” names in the catalog are misleading—they refer to a day‑long plan rather than unlimited high‑speed data.

For travelers who need more data, eSIMCard offers fixed‑data options. A 50 GB plan is available for 3, 5 or 7 days, and a 100 GB plan is offered for 180 days, both with full‑speed coverage on 2G, 3G, 4G (and 5G on the 100 GB global box). These fixed data plans are typically more cost‑effective than the daily capped options, especially for users who consume a lot of data.

eSIMCard provides 130 single‑country data plans and 32 multi‑country data plans that include coverage in Japan. The available plans vary in price from about $1.34 to $478.46 and in data cap from 1 GB to 100 GB, with validity periods ranging from 1 to 365 days. Among these, 74 plans offer a fixed data amount that is allocated for the entire validity period, while 88 plans impose a daily data cap that resets each day. Both types are available within the single‑country and multi‑country offerings, giving travelers multiple purchase options.