Keep On Roaming eSIM Data Plans for Japan

Keep On Roaming does not provide a truly unlimited data eSIM for Japan. Plans that contain “UNLIMITED” in the name actually offer a hard cap of 1 GB per day and, after that limit, the connection speed may be throttled, so the data is not unbounded.

Instead, Keep On Roaming sells fixed‑data options that might suit heavier users. For example, a 5 GB plan is available for 30 days at $15.00 USD, and a 20 GB plan can be purchased for 30 days at $22.00 USD. These plans give a larger pool of high‑speed data before any reduction in speed occurs, which can be more cost‑effective for travelers who expect to use more data.

Keep On Roaming offers only data‑only eSIM plans for Japan, and none of these plans include a local phone number or SMS capability. The provider does not provide inbound or outbound voice or text messaging services.

Travelers can use data‑based services such as WhatsApp, Telegram, or iMessage for calls and messaging, which do not require a phone number.

Keep On Roaming lists 12 single‑country data plans for Japan and offers 11 multi‑country plans that include Japan.

The single‑country plans range in price from about $7.00 up to $148.00, with data caps varying from 1 GB to 20 GB and validity periods from 1 to 30 days. Multi‑country plans show a similar price spread, often reaching the upper end of the range, and likewise provide data caps from 1 GB to 20 GB across a comparable validity window.

Within their catalogue, plans are divided into fixed‑data‑cap options (14 plans in total) and daily‑data‑cap options (9 plans). Fixed‑cap plans provide a set amount of data that does not reset daily, whereas daily‑cap plans reset at the end of each day and may be suitable for travelers needing predictable usage for short periods. All plans allow tethering where applicable.