PRIeSIM eSIM Data Plans for Japan

PRIeSIM does not offer a true unlimited data eSIM for Japan. The plans titled “Japan Unlimited” provide a maximum of 3 GB of high‑speed data each day; after that amount is reached the speed is reduced, as noted by the provider, and the plan has a fixed validity period ranging from 3 to 30 days.

If a traveler wants a larger, unrestricted data allowance, PRIeSIM provides fixed data plans such as 20 GB for 30 days, 50 GB for 90 days, and 100 GB for 180 days. These plans give the full data amount for the stated validity period without daily caps or speed reductions.

PRIeSIM does not provide a Japan eSIM that includes a phone number or SMS capability. The provider offers only data‑only plans for travelers visiting Japan.

Travelers who need voice or messaging can use popular VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. However, some destinations may block or restrict certain apps or VoIP services, so it is advisable to confirm that the applications you rely on are accessible in Japan before purchasing a plan.

PRIeSIM offers 13 single‑country data plans that cover Japan, and 28 multi‑country plans that include Japan among other destinations. The plans range in price from about $2.29 to $236.61 and offer data caps between 200 MB and 100 GB. Some plans are fixed‑data packages, while others use a daily data cap that resets each day.