Kolet eSIM Data Plans for Japan

Kolet does not provide a truly unlimited high‑speed data plan for Japan. The plans labeled “Japan UNLIMITED” give 5 GB per day at full 5G speed and then throttle to 1024 kbps after that daily allowance, so the data is limited.

Travelers who need larger amounts of high‑speed data can choose fixed‑data plans such as the 20 GB plan valid 30 days or the 10 GB plan valid 30 days, which supply more data at full speed without the speed reduction that occurs after the daily cap on the “UNLIMITED” plans.

Kolet does not provide an eSIM plan for Japan that includes a phone number or SMS capability. Their Japan offerings are data‑only, so no voice or text services are available through a local number. Travelers wishing to make voice calls or send messages can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection. However, some destinations may restrict access to specific apps or services, so it is advisable to verify that the apps you need are available in Japan before purchasing.

Kolet offers 13 single‑country plans and 10 multi‑country plans that include Japan. The provider provides both fixed‑data‑cap plans, which give a set amount of data for the entire validity period, and daily‑data‑cap plans, which allow a certain amount of data each day. Prices generally range from roughly $4 to $122, while data caps are between 1 GB and 20 GB across the various options.