iRoamly eSIM Data Plans for Japan

iRoamly offers unlimited data eSIM plans for Japan with prices ranging from $2.80 USD for a 1‑day plan to $75.00 USD for a 30‑day plan, covering 1–30 days of validity. All plans allow tethering and specify that the speed may be throttled after heavy use, with a normal maximum speed capped at 20 000kbps.

Because an unlimited plan follows a fair‑usage policy, speeds can be reduced once a certain volume of high‑speed data has been consumed. Travelers who are concerned about potential speed restrictions should contact iRoamly to confirm the typical amount of data that remains at normal speed and whether any additional limits apply.

iRoamly does not offer a Japan eSIM that includes a phone number or SMS capability. All iRoamly eSIM plans for Japan are data‑only. If travelers need voice or messaging services, they can rely on VoIP applications such as WhatsApp, Telegram, or iMessage, which operate over the data connection without requiring a local phone number or SMS functionality.

iRoamly offers several data packages for travel in Japan. Specifically, there are five single‑country plans that give access exclusively to Japanese networks, and two multi‑country plans that include Japan in a broader regional bundle. The single‑country options span from a modest 500 MB package up to unlimited data for periods ranging from one day to one year. The two multi‑country plans also offer a mix of fixed data volumes and daily caps, allowing travelers to choose a bundle that suits longer stays or lighter usage. Prices across these offerings start from free introductory deals and climb up to roughly $250, depending on the data cap and validity period chosen.