Ubigi eSIM Data Plans for Japan

There are no truly unlimited data eSIM plans for Japan offered by Ubigi.
Ubigi’s available plans are fixed‑data packages, the most generous of which provide 60 GB for 30 days. These plans come with a reduced speed of 2000 kbps and use the 5G network. If your data usage is high, a fixed‑data plan such as the 60 GB option may be more cost‑effective than a limited‑data alternative.

Ubigi does not provide any eSIM plans for Japan that include a phone number or SMS capability. All of Ubigi’s offerings for Japan are data‑only plans, so travelers will not receive an incoming or outgoing voice or text feature.

Because of this, users must rely on internet‑based applications such as WhatsApp, Telegram, or iMessage for calls and messaging. These VoIP services work over the data connection that the Ubigi eSIM provides, allowing communication without a traditional phone number.

Ubigi lists 15 single‑country data options for Japan and 39 multi‑country options that include Japan. Most of the single‑country plans are fixed data bundles ranging from 500 MB to 10 GB, while the multi‑country lists often mix fixed‑data bundles with daily‑based data caps that can be purchased for a set number of days. Prices across the catalog range from about $2.00 up to $440.00, offering a broad spread of data values from the 500 MB smallest to the 60 GB largest caps.