ZenSim eSIM Data Plans for Japan

ZenSim does not provide a true unlimited high‑speed data eSIM for Japan. The plans marketed as “Japan Unlimited STANDARD” supply a daily limit of 3GB and therefore are not unlimited; after that limit is reached, the connection speed is throttled, though the exact reduced speed is not listed.

If a traveler needs a larger data allowance, ZenSim offers fixed‑data plans such as the Japan 20GB plan, available for 10 days or 30 days, and the Japan 10GB plan valid for 30 days. These plans give a fixed amount of high‑speed data and can be more cost effective for moderate to heavy data use. ZenSim does not currently offer a truly unlimited data eSIM covering Japan.

ZenSim does not provide any eSIM plans for Japan that include a phone number or SMS capability. Only data‑only eSIMs are offered. Travelers who need to make calls or send messages can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection instead.

ZenSim provides 8 single‑country plans specifically for Japan, along with 8 multi‑country plans that include Japan as part of a broader regional offering. The plans span a price range of $13.00 to $70.00 and offer data caps from 3 GB up to 20 GB. Among these, 4 plans feature a daily data cap that resets each day, while 12 plans provide a fixed data amount for the full validity period. Tethering is allowed on the relevant plans.