mysim24 eSIM Data Plans for Japan

mySIM24 does not offer a truly unlimited data eSIM for Japan. All plans that include “Unlimited” in the name actually provide a fixed amount of high‑speed data—such as 5GB for a single day or 1GB per day for up to 30 days—and specify a reduced speed once the cap is reached (for example, 512 kbps after 1 GB or 2000 kbps after 2 GB).

For travelers who need more data, mySIM24 offers fixed‑data plans such as the 50 GB plan valid for 30 days (or 10 or 7 days), which can be a more cost‑effective choice for heavy data usage. These plans give a larger data allowance before any speed reduction applies, making them suitable for users who expect to consume several gigabytes during their stay in Japan.

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.

For travelers visiting Japan, mysim24 provides a total of 67 single‑country data plans and 11 multi‑country plans that include Japan in the coverage. The single‑country plans give you the freedom to stay within Japan, while the multi‑country packages are suitable for those who may need connectivity in additional destinations. The available plans span a price range from about $2.84 to $121.75, and data caps range from 1 GB to 50 GB. Some of the plans restrict data usage to a specific daily quota (daily data cap plans), whereas others offer a fixed amount of data that can be used at any time during the validity period (fixed data cap plans).