AirPlans eSIM Data Plans for Japan

AirPlans does not provide a truly unlimited high‑speed data eSIM for Japan. All plans that include “Unlimited” in their name actually offer a fixed amount of high‑speed data—such as 1 GB per day or 3 GB per day—after which the speed is throttled to a reduced rate. Travelers who need more data can choose AirPlans fixed data plans, such as the 100GB plan valid for 60 days, the 50GB plan valid for 30 days, or the 32GB plan valid for 20 days. These alternatives give a large data allowance without the speed reduction that applies to the “Unlimited” labels.

AirPlans does not provide Japan eSIM plans that include a phone number or SMS capability. Travelers can only purchase data‑only eSIMs from AirPlans for use in Japan. Over the data connection, popular VoIP applications such as WhatsApp, Telegram and iMessage can generally be used for voice and messaging, but users should verify that these services are accessible in Japan before buying, as some destinations may block or restrict specific apps or VoIP services.

AirPlans offers 29 single‑country data plans and 9 multi‑country data plans for Japan. The plans vary between fixed‑data‑cap options that provide a set amount of data for the duration of the validity and daily‑data‑cap options that replenish a specific amount of data each day. Prices across the catalog range from $1.59 to $197.92, while the data caps span from 500 MB to 100 GB, giving travelers a wide selection of options depending on their usage needs.