Giga.Tel eSIM Data Plans for Japan

Giga.Tel does not have a true unlimited data eSIM for Japan. The plans that list “Unlimited” in their name actually have a fixed data cap; for example, the “Asia 8 countries 1 days (2GB/day, Unlimited)” plan is limited to 2 GB and, after the cap is reached, the speed is throttled to 512 kbps. Similarly, the “Global 1 days (2GB/Day Unlimited)” plan has a 2 GB cap with the same reduced‑speed policy. Fixed‑data options are available, such as the Japan(KDDI+SB) 50GB plan valid for 30 days at $25.49 USD and the Japan 50GB plan valid for 30 days at $31.49 USD, which includes a reduced speed of 128 kbps after the data allowance is exhausted. Choosing a fixed data plan can be more cost‑effective for most travelers unless the user requires heavy data usage beyond the allotted amount.

Giga.Tel does not provide eSIM plans for Japan that include a phone number or SMS capabilities. The available plans are strictly data‑only, meaning users can access the internet but cannot receive inbound calls or SMS messages on a local Japanese number. Travelers can still use data‑based VoIP applications such as WhatsApp, Telegram, and iMessage for voice calls and messaging without relying on a local phone number or SMS service, but no native telephony or SMS feature is offered by Giga.Tel for Japan.

Giga.Tel offers 24 single‑country plans that include Japan, in addition to 28 multi‑country plans that also cover Japan.
The plans span a price range from $4.99 to $307.99 and a data cap range from 500 MB up to 90 GB.
Among the options, some provide a fixed data allowance while others impose a daily data cap, giving travelers flexibility in how they manage usage.