AirPlans eSIM Data Plans for Japan

AirPlans does not provide a truly unlimited data eSIM for Japan. The plans labeled “Unlimited” give 1GB of high‑speed data each day; once that threshold is reached the speed drops to 512 kbps.
If a traveler requires more data, AirPlans offers fixed‑data plans such as 60 GB for 125 days or 50 GB for 30 days (and 180 days). These plans supply the full data amount at regular speeds and can be more cost effective for heavy data users.

AirPlans does not provide a Japan eSIM that includes a phone number or SMS capability. The available Japan eSIMs from AirPlans are data‑only plans. 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 these services, so users should verify that the apps they rely on are accessible in Japan before purchasing a plan.

AirPlans provides 15 single‑country data plans for Japan and 29 multi‑country plans that include Japan. Among the available options there are both daily data‑cap plans—14 different daily limits—and fixed data‑cap plans—30 different data amounts—allowing travelers to choose between a daily usage cap or a set data allotment for the validity period. Prices range from roughly $3.20 to $300, data caps span from 1 GB to 60 GB, and the validity period extends from one day to one year.