AeroSims eSIM Data Plans for Japan

AeroSims does not supply a true unlimited data eSIM for Japan. The plans that carry the “Unlimited” label actually provide only 5 GB of high‑speed data each day; once that amount is reached the speed is throttled to a reduced level (the throttled speed is not specified).

If you need more data, AeroSims offers fixed‑data alternatives. For example, a 50 GB plan for 30 days costs $34.90 USD, a 20 GB plan for 30 days costs $16.90 USD, and a 50 GB plan for 180 days costs $56.90 USD. These fixed plans can be more cost‑effective for travelers who anticipate heavy data use or who want to avoid speed reduction after a daily limit.

AeroSims does not offer any Japan eSIM that includes a phone number or SMS capability. The provider only sells data‑only eSIM plans for Japan. Travelers who need voice or text functionality can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection, but they should confirm that the apps they rely on are accessible in Japan before purchasing an eSIM.

AeroSims provides a variety of options for travelers headed to Japan. The carrier lists 13 single‑country data plans that cover Japan exclusively, while it also offers 27 multi‑country plans that include Japan as part of a broader geographic package. Among the available plans, members of both daily data‑cap and fixed data‑cap types are represented. Across AeroSims’ catalogue the prices run from $3.90 to $188.58, the data caps range from 3 GB up to 50 GB, and validity periods span 1 day to 180 days.