Japan eSIM: daily caps, throttling and hotspot, brand by brand
Of 28 travel eSIM brands with a rule that applies to Japan, 15 publish a daily full-speed allowance, 13 publish the speed you drop to afterwards and 6 state a hotspot rule (1 block hotspot outright). 6 rows rest on dated customer reports rather than the brand's own page and are marked unverified. Every number links to its source with the date it was observed; last review 2026-10-19.
Japan is where "unlimited" claims get tested hardest: travellers stream maps, translation and video all day, and most unlimited travel eSIMs roam onto NTT Docomo or SoftBank with a daily full-speed bucket before slowing down. The table shows what each brand actually publishes for Japan, or for Asia or worldwide where the brand has no Japan-specific rule. Our own plans are listed below the table with the same three numbers.
What other brands publish for Japan
One row per brand: the most specific rule that applies (16 country-specific, 0 regional, 12 worldwide). The full dataset, with every scope, is at /dataset.
Published and reported fair-use limits for major travel eSIM brands
Plan facts fetched . Prices and the buy buttons are on the plan page.
What to watch for in Japan
A brand with no Japan-specific row is governed by its regional or global rule, which may be stricter in practice.
Hotspot matters more in Japan than most places: hotel and rail Wi-Fi often needs a Japanese phone number to register.
Since April 2026, SIMs sold by Japanese providers need identity checks; roaming travel eSIMs bought abroad do not.
We sell eSIMs. Competitor limits shown here are sourced and dated; corrections are welcome. Dataset licence CC BY 4.0; cite the dataset page, not this summary.