MobileSIM eSIM Data Plans for Japan

MobileSIM does not provide a truly unlimited data eSIM for Japan. The plans labeled “Japan Unlimited data” actually allow 3GB per day of high‑speed data, after which the speed is reduced to 1000kbps. For travelers who require more consistent data usage, MobileSIM offers fixed‑data alternatives. For example, the Japan 20GB for 30 days plan costs $25.00 USD, and the Asia 50GB for 90 days plan, usable in Japan, costs $69.00 USD. These fixed‑data options may be more cost effective for users who need high‑speed data without daily caps.

MobileSIM does not provide an eSIM plan for Japan that includes a local phone number or SMS capability. The provider offers only data‑only eSIMs for travelers in Japan. Travelers who need voice or text communication can rely on internet‑based VoIP applications such as WhatsApp, Telegram, and iMessage, which work over the data connection without requiring a traditional phone number or SMS service.

MobileSIM provides 12 single‑country plans and 22 multi‑country plans for Japan. The offerings cover a price range of $1.50 to $89.00 and a data cap range from 200 MB to 100 GB. Some plans have fixed data amounts while others allow a daily data limit, giving travelers flexible options for both short‑term stays and longer visits.