BlueSky eSIM eSIM Data Plans for Japan

BlueSky eSIM does not provide a truly unlimited data plan for Japan. The plans that carry “Unlimited” in their name give a daily allowance of 3GB; once that 3GB is used, the connection speed drops to 1000kbps. These are fixed data plans that are valid for a set number of days (3, 5, 7, 10, 15, or 30 days).

For travelers who need a larger data ceiling, BlueSky eSIM offers fixed data plans such as 100GB for 180 days, or 50GB for 7, 15, 30, or 90 days. These options allow higher data usage without the daily speed throttling that applies to the “Unlimited” listings.

BlueSky eSIM does not provide a Japan eSIM that includes a local phone number or SMS capability. Only data‑only plans are available. Travelers who need voice or messaging can still use VoIP apps such as WhatsApp, Telegram, or iMessage over the data connection, though they should confirm that these services are accessible in Japan before purchasing.

BlueSky eSIM supplies 12 single‑country data plans that cover Japan and 37 multi‑country plans that include Japan among their destinations. Prices for these options range from about $1.97 to $100.15, while data caps vary between 200 MB and 100 GB, with validity periods spanning 3 to 365 days. Among the plans, fixed data plans provide a set amount of data for the entire duration, whereas daily‑data‑cap plans set a maximum amount of data allowed each day before a speed reduction to 1 Mbps may apply.