Bought the wrong plan? An unused, never-activated eSIM can be refunded in full within 30 days of purchase. See our refund policy for the full terms.
Fixed data plans give you a set amount of data, for example 1 GB or 5 GB, to use at full speed for the whole plan period. When it runs out, you top up or buy again. Pick this if you know roughly how much you'll use.
Unlimited plans have no total data cap for the plan period, but each day includes a high-speed allowance. Once you use that day's allowance, you carry on at a reduced speed. Reduced-speed data has a daily limit too, and if you reach it, data pauses until the allowance resets 24 hours after you activate the eSIM. Pick this for heavier or less predictable use. A fair-use policy applies.
Pay As You Go is not a plan at all. You add credit once and it comes off by the megabyte at the local rate as you use it, so you never pay for data you do not finish. Credit never expires, data pauses when the balance hits zero, and the same eSIM keeps working across every country we cover. It costs more per gigabyte than a plan, so pick this for light or hard to predict use rather than heavy days.
Add your other stops and we check whether one regional eSIM costs less.
See how a whole Japan eSIM plan compares with a typical day of carrier roaming.
Roaming rate is an approximate mainstream day-pass price shown for comparison only — your own carrier's charges may differ.
Japan has four mobile networks: NTT docomo, au (KDDI), SoftBank and Rakuten Mobile. Signal in the mountains can be seasonal: on Mount Fuji, docomo covers the climbing trails, but the summit only gets service during the summer climbing season.
The free Japan Wi-Fi auto-connect app, promoted by Japan's national tourism organization, signs you in to free hotspots at airports, train stations, convenience stores and cafes after a single sign-up.
LINE is the messenger used by the vast majority of people in Japan, older generations included, according to the communications ministry. If you'll be meeting locals, install it before you go.
The government's free Safety tips app pushes earthquake, tsunami, heavy rain and volcano warnings to visitors in English and other languages.
For any other help, the hotline answers in English around the clock.
Regional & global eSIMs that also cover Japan on one plan.
One eSIM for the whole trip — premium tier-1 networks across the globe.
One eSIM across 26 countries — no SIM swaps at the border.
Pick a row, watch the phone.
Everything you need to know before you buy.
Your Japan eSIM connects automatically to NTT Docomo, SoftBank, and au (KDDI), switching to the strongest available signal. Excellent nationwide coverage, including on the Shinkansen and metros.

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