Giga.Tel eSIM Data Plans for Japan

Giga.Tel does not offer a true unlimited data eSIM for Japan. The plans that use “Unlimited” in their names—such as Global Unlimited 5 Days, Global Unlimited 7 Days, and Global Unlimited 15 Days—actually provide 1GB/day of high‑speed data. After the daily limit is reached, the connection speed is reduced to 512kbps, and the plans are marked with hasUnlimitedName = true to indicate they are not unlimited.

Travelers who need more data can opt for fixed‑data plans. For instance, Giga.Tel offers a 50GB 30‑day eSIM that is marketed for Japan, as well as a 60GB plan valid for 90 days that includes tethering and 5G connectivity. Giga.Tel also provides a 90GB plan with 365‑day validity; after the 90GB is used, the speed drops to 512kbps. These fixed‑data options may be more cost‑effective and avoid the speed throttling that occurs after the daily limit on the “Unlimited”‑named plans.

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 cover Japan, and 32 multi‑country plans that include Japan in their coverage.
In those plans the data allowance ranges from 500 MB up to 90 GB, while the price stays between $4.99 and $307.99.
Some plans provide a fixed data amount (for example, a one‑time upload of 10 GB), whereas others impose a daily data cap that repeats each day of the validity period.