nextSIM eSIM Data Plans for Japan

nextSIM does not provide any plan that offers unlimited high‑speed data for Japan. Every plan listed under the “Unlimited” name has a fixed data cap—ranging from 1GB up to 2GB per day—with a reduced speed applied once the cap is reached. Instead, nextSIM offers fixed‑amount plans that keep full 5G speeds throughout the validity period; for example, the eSIM Japan 20GB 30Days Standard provides 20GB of high‑speed data for 30 days at a lower price, and the eSIM Japan 50GB 30Days Economy gives 50GB for 30 days at a modest cost. Choosing a fixed‑cap plan can be more cost‑effective for most travelers unless a user requires very heavy data usage.

nextSIM does not provide an eSIM plan with a local phone number or SMS capability for Japan.
Only data‑only eSIMs are offered, which allow internet access on 4G or 5G networks.
Travelers can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection to make calls and send messages.

nextSIM lists 73 single‑country data plans for Japan and 28 multi‑country plans that can be used in Japan as part of a broader regional package. The single‑country plans range in price from about $2.80 to more than $1, 300 and offer data caps from 1 GB up to 50 GB. The multi‑country options cover similar price and data ranges, allowing travelers to switch between destinations while maintaining the same data allowance. Plans are offered in both fixed‑data‑cap format and daily‑data‑cap format, giving users the flexibility to choose a plan that matches their specific data needs.