eSIMGuide - Compare Travel eSIM Plans

Updated Sep 2026

Flag of Japan

Compare eSIMs for Japan 2026

Compare 4,092 plans from 32 providers

AirHub
AirHub for JapanFlag of Japan3 hours ago
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1GB100GB+

Which mobile networks you get in Japan

Published lists for Japan name au and SoftBank most often, with NTT docomo also appearing widely and Rakuten Mobile Network less often. That makes the operator a property of the eSIM selected, rather than a fixed feature of Japan itself: two plans for the same destination may be listed on different networks. The four names below are therefore worth checking before buying, particularly when a specific Japanese operator matters to your itinerary.

  • auBest stated technology: 5G

    Operated by KDDI Corporation

    17 of 19 providers

    AbestESIM, Roamix, iroamly, MicroESIM, and eSimCard +12 more

  • SoftBankBest stated technology: 5G

    Operated by SoftBank Corp.

    17 of 19 providers

    AbestESIM, iroamly, Roamix, MicroESIM, and JamboSIM +12 more

  • NTT docomoBest stated technology: 5G

    Operated by NTT DoCoMo, Inc.

    14 of 19 providers

    iroamly, Roamix, PuraSIM, AbestESIM, and MicroESIM +9 more

  • Rakuten Mobile NetworkBest stated technology: 5G

    Operated by Rakuten Mobile Network, Inc.

    8 of 19 providers

    Roamix, PuraSIM, Esimatic, AirPlans, and Always Mobile +3 more

Where your data comes out in Japan

The choice of provider decides whether traffic breaks out locally or travels abroad: only one listed option uses a Japanese gateway; the others route via Hong Kong, Singapore, the UK or the United States. That affects latency, not download speed: round trips to Japanese services should typically be about 97ms, rising to roughly 178ms via the US, so gaming and video calls may feel less responsive. It also changes your apparent location, and a foreign IP can make a local banking app refuse access.

Where each provider breaks out, nearest first. Estimated from distance, not measured.

220 ms
  • RoamixRoamixFlag of Hong Kong~62 ms
  • PuraSIMPuraSIMFlag of Hong Kong~62 ms
  • Always MobileAlways MobileFlag of Hong Kong~62 ms
  • AbestESIMAbestESIMFlag of Singapore~97 ms
  • AirHubAirHubFlag of Poland~162 ms
  • GigSkyGigSkyFlag of United States of America~178 ms

What eSIM data costs in Japan

A gigabyte of data on a Japan eSIM typically costs $0.75 today — 18% less than the $0.92 it cost in December 2025, over which time the number of plans we compare for Japan went from 1,523 to 4,092.

That is 39% below the $1.23 a gigabyte typically costs across the 229 destinations we track — only 47 of them come in lower, which puts Japan among the cheapest places in the world to buy mobile data as a visitor. It has never been cheaper: $0.75 in September 2026 is the lowest figure we have recorded for Japan.

Every figure here is the lower quartile of the plans in our catalogue that month — the cheaper end of what was actually on sale, rather than an average pulled up by a handful of premium plans.

  • Japan$0.75
  • All destinations$1.23
Typical per GB
$0.75down 18% since Dec 2025
Typical per day
$0.66down 1% since Dec 2025
Plans compared
4,092up 2,569 since Dec 2025
Providers
32up 9 since Dec 2025

Change measured since December 2025, our first monthly snapshot.

Show all 10 months
September 2026$0.75down 4% on the previous monthTypical per GB$0.66up 10% on the previous monthTypical per day4,092up 14% on the previous monthPlans32up 4 on the previous monthProviders
August 2026$0.78down 7% on the previous monthTypical per GB$0.60down 10% on the previous monthTypical per day3,583up 14% on the previous monthPlans28up 4 on the previous monthProviders
July 2026$0.84down 1% on the previous monthTypical per GB$0.67Typical per day3,147down 1% on the previous monthPlans24down 1 on the previous monthProviders
June 2026$0.85up 2% on the previous monthTypical per GB$0.67down 4% on the previous monthTypical per day3,181up 3% on the previous monthPlans25Providers
May 2026$0.83Typical per GB$0.70up 46% on the previous monthTypical per day3,084up 2% on the previous monthPlans25up 1 on the previous monthProviders
April 2026$0.83up 2% on the previous monthTypical per GB$0.48down 25% on the previous monthTypical per day3,017up 26% on the previous monthPlans24up 1 on the previous monthProviders
March 2026$0.81down 17% on the previous monthTypical per GB$0.64down 2% on the previous monthTypical per day2,388down 12% on the previous monthPlans23Providers
February 2026$0.98up 3% on the previous monthTypical per GB$0.65down 7% on the previous monthTypical per day2,722up 53% on the previous monthPlans23Providers
January 2026$0.95up 3% on the previous monthTypical per GB$0.70up 4% on the previous monthTypical per day1,784up 17% on the previous monthPlans23Providers
December 2025$0.92Typical per GB$0.67Typical per day1,523Plans23Providers

Frequently Asked Questions about eSIMs for Japan

How many travel eSIM brands (providers) are available for use in Japan, and how many prepaid data plans are there?

Access listed for Japan is resold from au, SoftBank, NTT docomo and Rakuten Mobile Network, rather than provided by the travel brands themselves. Most major eSIM providers sell plans for the destination, with AbestESIM, Roamix, AirHub, iroamly, MicroESIM and Stellar eSIM carrying the deepest catalogues in this comparison. That makes the provider list less useful than the plan details: check how much data is included, how long it lasts, and what applies after it is used. A recognisable name may offer several different sizes and durations, so brand familiarity alone does not settle the choice.

What are the mobile networks available for a travel eSIM in Japan?

au, SoftBank, NTT docomo and Rakuten Mobile Network are all named in provider listings for Japan. That gives buyers a choice of operator at the product level, although they do not usually select one themselves after purchase. Instead, the eSIM provider’s published network information indicates which operator that particular eSIM is intended to use. Comparing those operator listings before choosing an eSIM can therefore tell you more about the connection arrangement than the brand name alone. The listings reflect what providers have disclosed, not a ranking of Japanese networks or a guarantee of signal in every location.

Are there any free data eSIM plans available for Japan?

At least one zero-priced data offer is available for Japan, but it is a small promotional allowance rather than something to use throughout a trip. It normally requires registration and is limited to a single redemption, so its practical value is getting online briefly on arrival or testing compatibility. With most major eSIM providers selling Japanese plans, this is an exception in a well-stocked market, not a meaningful free tier alongside the regular options.

Are there any unlimited data eSIM plans available for Japan?

Several major providers sell plans marked unlimited for use in Japan, so there is a real choice rather than a single niche offer. The catch is that “unlimited” describes the amount, not constant speed: one plan may restore its fast allowance each day, while another slows down after its full-speed data is used for the trip. Check that schedule and the reduced speed before buying; at throttled rates, messaging may work, but video and map loading can suffer.

eSIM Providers for Japan

au and SoftBank are two of the operators available through Japan’s eSIM providers, with NTT docomo and Rakuten Mobile Network also represented. That gives travellers a real choice: an eSIM listing several networks offers another operator to land on when one is weaker in a particular area. Most major providers cover much of this network range, while a few list only one; Roamix reaches the widest selection. For rural or multi-stop trips, prioritise several named networks.

27 providers sell eSIMs for Japan. Open one for its prices, its full plan list and the networks it puts you on here.