Wiiline eSIM Data Plans for Japan

Wiiline does not provide a truly unlimited data eSIM for Japan. The plans marketed as “Unlimited” actually supply 5GB of high‑speed data each day; when the 5GB/day limit is reached, the speed is throttled to 256 kbps.

For travelers who need a larger, predictable data allowance, Wiiline offers fixed‑data plans such as 80 GB for 365 days at $150.00, 50 GB for 30 days at $35.00, and 30 GB for 30 days at $27.00. These plans give consistent high‑speed connectivity without daily caps.

Wiiline does not provide a Japan eSIM that includes a phone number or SMS capability. All of its eSIM plans for Japan are data‑only, so travelers will not be able to send or receive text messages or make voice calls through a local mobile number.

Instead, users can rely on popular VoIP applications such as WhatsApp, Telegram, or iMessage, which work over the data connection and allow messaging and voice or video calls without needing a mobile phone number or SMS functionality.

Wiiline’s catalog for Japan contains 28 distinct data plans, divided equally between 14 single‑country offerings and 14 multi‑country options. The single‑country plans provide data exclusively for Japan, while the multi‑country plans bundle Japan coverage with additional destinations, enabling travelers to switch networks across regions without needing a new eSIM.

Across both categories, prices run from roughly $1.83 for the smallest bundles up to $150 for the most generous packages, and data caps span from 490 MB to 80 GB depending on the chosen plan. The fixed‑data‑cap packages dominate the selection, offering clear, predetermined data limits, whereas a smaller subset of plans feature daily data caps to suit short‑term roaming needs.