eSIM for Japan

Roamless Japan eSIM

3.4 out of 5 review rating, from(537 reviews)Global reseller49 plans from $2.45

49 plans on SoftBank and au. 5 GB for a week from US$9.95. Prices checked .

Is Roamless good for Japan?

Roamless runs on SoftBank and au, strong in all 10 areas on our coverage map, with good 4G at all 28 rural and mountain places. A week with 5 GB costs US$9.95, the 24th cheapest of the 60 providers with a week plan. 5G on every plan. Hotspot allowed. 30 unlimited plans, 30 of them with 3 GB a day at full speed. Review rating 3.4 out of 5 from 537 customer reviews. How we rank Roamless.

Japan plans

DataPriceCompare
1 GB
30 days
$3.95
1 GB
No expiry
$2.45
2 GB
No expiry
$4.90
3 GB
30 days
$7.95
3 GB
No expiry
$7.35
4 GB
No expiry
$9.80
5 GB
30 days
$9.95
5 GB
No expiry
$12.25
6 GB
No expiry
$14.70
7 GB
No expiry
$17.15
8 GB
No expiry
$19.60
9 GB
No expiry
$22.05

Roamless speed and data rules

Roamless data rules by plan type
Data at full speedWhen it runs outPlans
3 GB a daySlows to 1 Mbps until the allowance refills, every 24 hoursBrowsing and music, not HD video30 plans
1 to 25 GBRoamless doesn't say13 plans
1 to 50 GBRoamless doesn't say6 plans

Roamless: “3GB of full-speed data every day.” Source

Roamless ratings from customer reviews

537 reviews: 299 on the App Store, 146 on Google Play, 90 on Trustpilot and 2 on Productreview, written 14 Oct 2023 to 12 Nov 2026. 19 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.

Review rating3.4 out of 5The mean of the ratings below

Roamless ratings by aspect
AspectRatingReviews that mention it
Speed2.7 out of 534 reviews
Coverage3.4 out of 5206 reviews
Setup3.7 out of 5128 reviews
Support3.8 out of 576 reviews
Value3.6 out of 5178 reviews
App3.4 out of 5113 reviews
Data problems4.8% of reviews26 of 537 reviews report one
Refund problems5.8% of reviews31 of 537 reviews report one

On trips to Japan: coverage 3.7 from 15 reviews.

Roamless speed tests in Japan

1 published speed test of Roamless in Japan, by Find Your eSIM.

  • Shiba Park, Tokyo346 Mbps
    Upload 66.6 MbpsLatency 165 ms
    Find Your eSIM, Aug 2026
Published speed tests of Roamless in Japan
WhereDownloadUploadLatencyTested by
Shiba Park, Tokyo346 Mbps66.6 Mbps165 msFind Your eSIMAug 2026

How fast these networks are for their own customers

Ookla's median speeds for people on each network's own plans, H1 2026 unless marked.

  • KDDI (au)
    Download
    67.85 Mbps
    Time on 5G
    48.8%
  • SoftBank
    Download
    73.78 Mbps
    5G download
    153.55 Mbps
    Time on 5G
    41.4%
    Latency
    45 ms
Ookla speeds for each network's own customers
NetworkDownload5G downloadTime on 5GLatency
KDDI (au)67.85 MbpsNot published48.8%Not published
SoftBank73.78 Mbps153.55 Mbps41.4%45 ms

Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026.