Wiiline eSIM Data Plans for Japan

Wiiline does not provide a truly unlimited high‑speed data eSIM for Japan. The plans that carry “Unlimited” in their name actually allow only 1GB of high‑speed data (or 1GB per day) before the speed is throttled to 256kbps. After the 1GB limit is reached, the connection continues but at the reduced speed listed in the plan details.

Fixed‑data plans are available as alternatives. For example, a 50GB plan can be purchased for 15 days at $32.00 USD or for 30 days at $35.00 USD. A global plan with 80GB for 365 days costs $150.00 USD. These fixed‑data options can be more cost effective for travelers who need larger data allowances without the speed reduction that occurs after the 1GB allotment.

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 offers 17 single‑country data plans and 10 multi‑country plans that cover Japan, with prices ranging from about USD 1.84 to USD 150 and data caps between roughly 490 MB and 80 GB. The catalogue includes both fixed‑data‑cap plans, which provide a set amount of data for the entire validity period, and daily‑cap plans, which limit the amount of data available each day.