eSimfly eSIM Data Plans for Japan

eSimfly does not provide a true unlimited data eSIM for Japan. The plans branded as “Asia Unlimited” actually give 3 GB of high‑speed data per day and throttle the speed to 1024 kbps once the daily cap is reached, so they are not unlimited in the sense of unobstructed data usage.

Travelers looking for larger data amounts can choose fixed‑data plans instead. For example, Japan 50GB 30Days (IIJ) offers 50 GB for 30 days at $20.91, Asia 100GB 180Days gives 100 GB for 180 days at $69.12, and Global 100GB 31Days supplies 100 GB for 31 days at $58.77. These plans provide more data and no speed reduction after the data cap, making them a cost‑effective alternative for most users.

eSimfly does not provide Japan eSIMs that include a phone number or SMS capability. All eSimfly plans for Japan are data‑only. Travelers can still make voice calls and send messages using VoIP apps such as WhatsApp, Telegram, or iMessage over the data connection.

eSimfly lists 10 single‑country plans that cover Japan and 38 multi‑country plans that include Japan. The available plans range in price from $1.96 to $100.19 and offer data caps between 1 GB and 100 GB for validity periods from 3 to 365 days. Plans are structured either with a fixed data amount that can be carried over between days or with a daily data cap; 42 plans use the fixed‑data model while 6 use the daily‑cap model.