AirPlans eSIM Data Plans for Japan

AirPlans does not offer a truly unlimited data eSIM for Japan. All plans labeled “Unlimited” actually provide a set amount of high‑speed data—such as 1 GB for a 1‑day plan or 3 GB per day for the 3‑day, 5‑day, 7‑day, 10‑day, 15‑day and 30‑day options—and the speed is reduced (to 512 kbps or 1000 kbps) once the data allotment is reached. Therefore, these plans are fixed data plans rather than unlimited offerings.

For travelers who need a large amount of high‑speed data without daily limits, AirPlans’ fixed data plans are available. Examples include the Japan 100GB 60 days plan, which offers 100 GB of data for 60 days, and the Japan 50GB 30 days plan, which provides 50 GB for 30 days. These options can be more cost‑effective for heavy data users compared to the “Unlimited” plans that throttle speed after a limited data cap.

AirPlans sells eSIM plans for Japan that include a phone number and SMS capability. The plans range from 1GB of data for 7 days at $13.01 USD to 5GB of data for 60 days at $49.45 USD. Each plan provides a phone number with dialing code +1, allowing inbound and outbound voice calls and inbound and outbound SMS messages. The numbers are not local Japanese numbers but are international numbers that work in Japan. Travelers who need specific call or messaging features should confirm the details directly with AirPlans.

AirPlans provides 23 single‑country data plans and 13 multi‑country plans for travelers in Japan. The available plans span a price range from $1.58 to $197.92 and offer data caps between 500 MB and 100 GB. Within this selection, some plans deliver a fixed data amount for the entire validity period, while others apply a daily data cap that resets each day. This mix allows users to choose a plan that best matches their usage pattern and budget.