Astaroam eSIM Data Plans for Japan

Astaroam does not provide a true unlimited data eSIM plan for Japan. The plans that include “Unlimited” in their name limit high‑speed data to 2GB per day and reduce the speed to 512kbps once that daily allowance is reached.

Travelers who need more data can choose fixed‑data options such as the 20GB 30‑day plan or the 10GB 30‑day plan, both of which offer 5G coverage in Japan and allow tethering. These fixed plans may be more cost‑effective for typical usage, while very heavy data consumers may prefer a higher‑cap plan.

Astaroam does not offer any eSIM plan for Japan that includes a phone number or SMS capability. Only data‑only eSIMs are available from this provider for Japan. Travelers can still use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection to make calls and send messages.

Astaroam offers a range of plans for Japan, with eight singles‑country options and twelve multi‑country bundles that include Japan, for a total of twenty distinct plans. The portfolio is split between fixed‑data‑cap plans, sixteen in number, and daily‑data‑cap plans, four in number, allowing customers to choose a steady data allowance or a flexible daily limit. Overall prices span from about $4.82 to $51.30, and data capacities range from 1 GB to 20 GB, with validity periods from 5 to 30 days.