eSIMGuide - Compare Travel eSIM Plans

Updated Sep 2026

Flag of Japan

Compare eSIMs for Japan 2026

Compare 6,848 plans from 45 providers

eSIM Guide
JapanFlag of Japan9 hours ago
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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

    27 of 29 providers

    Bloomy eSIM, RedEx eSIM, AbestESIM, Roamix, and iroamly +22 more

  • SoftBankBest stated technology: 5G

    Operated by SoftBank Corp.

    26 of 29 providers

    RedEx eSIM, AbestESIM, iroamly, ESIM.DOG, and Roamix +21 more

  • NTT docomoBest stated technology: 5G

    Operated by NTT DoCoMo, Inc.

    24 of 29 providers

    RedEx eSIM, Bloomy eSIM, iroamly, Roamix, and eSIMnow +19 more

  • Rakuten Mobile NetworkBest stated technology: 5G

    Operated by Rakuten Mobile Network, Inc.

    17 of 29 providers

    Bloomy eSIM, Roamix, RedEx eSIM, eSIMnow, and PuraSIM +12 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
  • Bloomy eSIMBloomy eSIMFlag of Hong Kong~62 ms
  • RoamixRoamixFlag of Hong Kong~62 ms
  • eSIMnoweSIMnowFlag of Hong Kong~62 ms
  • AbestESIMAbestESIMFlag of Singapore~97 ms
  • ESIM.DOGESIM.DOGFlag of United Kingdom~159 ms
  • RedEx eSIMRedEx eSIMFlag of United Kingdom~177 ms

What eSIM data costs in Japan

A gigabyte of data on a Japan eSIM typically costs $0.86 today — 7% 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 6,848.

That is 48% below the $1.64 a gigabyte typically costs across the 229 destinations we track — only 50 of them come in lower, which puts Japan among the cheapest places in the world to buy mobile data as a visitor. The move is recent: the figure went up 10% in September 2026 alone.

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$0.86
  • All destinations$1.64
Typical per GB
$0.86down 7% since Dec 2025
Typical per day
$0.87up 30% since Dec 2025
Plans compared
6,848up 5,325 since Dec 2025
Providers
45up 22 since Dec 2025

Change measured since December 2025, our first monthly snapshot.

Show all 10 months
September 2026$0.86up 10% on the previous monthTypical per GB$0.87up 45% on the previous monthTypical per day6,848up 91% on the previous monthPlans45up 17 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?

Travel eSIM listings here name au and SoftBank most widely, with NTT docomo and Rakuten Mobile Network also appearing underneath the offers. The market is crowded: RedEx eSIM, AbestESIM, Roamix, AirHub, iroamly and MicroESIM all have sizeable catalogues for Japan. That means the practical choice is not finding a seller, but separating plans by their included data, duration and what happens once the allowance is exhausted. A familiar provider may offer several variants, yet still have a catalogue that is too large, too short or poorly suited to a particular trip.

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

au, SoftBank, NTT docomo and Rakuten Mobile Network are the Japanese operators named in travel eSIM listings. That gives you a genuine choice of underlying network, but it is usually made when you choose the provider rather than after installation: providers publish their own operator pairings, so the network associated with a particular eSIM can be known in advance. These names describe what providers have disclosed, not a guarantee of reception or performance on every phone and street. The allowance and terms vary by eSIM, but they do not give you a free choice between all these networks once the plan is active.

Are there any free data eSIM plans available for Japan?

A zero-priced data option is available for Japan, but it is a small trial rather than a trip-ready allowance. It often requires registration with the provider and is limited to one redemption per customer, so it may get you online briefly but is not a substitute for a normal travel plan. That distinction matters in Japan’s broad eSIM market: free offers are promotional samples amid many paid options, not a standard tier across providers.

Are there any unlimited data eSIM plans available for Japan?

Unlimited-labelled options are available, and most major travel eSIM brands offer something under that heading. The catch is that “unlimited” means continued access, not unlimited full-speed use: once the plan’s fast-data allowance is used, speeds are reduced, sometimes until the next daily reset and sometimes for the rest of the validity period. Those rules vary between plans, so check the allowance and reset conditions before choosing; the label alone is not enough for a fair comparison.

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.

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