Simfinity eSIM Data Plans for Japan

Simfinity does not provide a true unlimited data eSIM plan for Japan. The plans listed under the name “Japan Unlimited” actually include a 1 GB data cap, after which the connection would slow to reduced speeds, so they are not unlimited in the sense of unrestricted high‑speed data.

Fixed data plans are available as alternatives. For example, a 10 GB high‑speed plan for 30 days costs $23.80 USD, and a 25 GB plan with unlimited validity costs $104.90 USD and covers Japan plus 104 other countries. These fixed‑data options can be more cost‑effective unless a traveler is an extremely heavy data user.

Simfinity does not provide any Japan eSIM that includes a local phone number or SMS capability. The company offers only data‑only eSIMs for Japanese travelers. To make voice or text calls, users can still rely on VoIP services such as WhatsApp, Telegram or iMessage, which work over the data connection without needing a local phone number or SMS support.

Simfinity offers 9 single‑country data plans for Japan, each with a fixed data allowance that can be used during the plan’s validity period, and 18 multi‑country plans that include Japan as part of a broader regional or global package. The available plans range in price from approximately $1.80 to $158 and in data cap from 100 MB up to 25 GB, giving travelers a wide range of options to suit different data needs and budgets.