mysim24 eSIM Data Plans for Japan

mysim24 does not provide a true unlimited data eSIM for Japan. Every plan marked as “Unlimited” has a fixed high‑speed data allowance—such as 1 GB per day or 5 GB per day—after which the speed drops to 512 kbps or 2000 kbps.

For travelers needing more data, mysim24 offers fixed data plans. Examples include a 50 GB plan valid for 3 to 30 days, priced between $28.43 and $32.42 USD, and daily plans of 1 GB or 5 GB that may be more economical for moderate usage.

No, mysim24 does not offer any Japan eSIMs that provide a phone number or SMS capability. The provider’s Japan plans are data‑only; a phone number and inbound or outbound voice or SMS services are not included. Travelers who need to make voice calls or send standard SMS can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection, although some destinations may block or restrict particular apps, so it is advisable to confirm that the services you rely on are accessible in Japan before purchasing.

mysim24 provides 70 single‑country data plans that cover Japan and 23 multi‑country packages that also include Japan. The available plans vary from about $1.13 to $121.99, with data limits ranging from 1 GB up to 50 GB. Plans are structured either as fixed data allotments or daily data caps; fixed plans give a set amount of data for the chosen validity period, while daily caps limit the amount usable each day until the period ends.