eSIM for Japan

Japan Wireless eSIM

3.6 out of 5 review rating, from(21 reviews)Japan specialist79 plans from $5.20

79 plans on au and Docomo. 5 GB for a week from US$10.19. Prices checked .

Is Japan Wireless good for Japan?

Japan Wireless runs on au and Docomo, 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$10.19, the 32nd cheapest of the 60 providers with a week plan. 5G on some plans. Hotspot allowed on some plans. 51 unlimited plans, 30 of them with 3 GB a day at full speed. Review rating 3.6 out of 5 from 21 customer reviews. How we rank Japan Wireless.

Japan plans

DataPriceCompare
1 GB
3 days
1 GB at full speed, then data stops
$5.39
1 GB
5 days
1 GB at full speed, then data stops
$5.64
1 GB
7 days
1 GB at full speed, then data stops
$5.89
3 GB
5 days
3 GB at full speed, then data stops
$6.76
3 GB
7 days
3 GB at full speed, then data stops
$7.70
3 GB
15 days
3 GB at full speed, then data stops
$8.53
3 GB
30 days
3 GB at full speed, then data stops
$9.32
5 GB
3 days
5 GB at full speed, then data stops
$8.86
5 GB
5 days
5 GB at full speed, then data stops
$9.32
5 GB
7 days
5 GB at full speed, then data stops
$10.30
5 GB
15 days
5 GB at full speed, then data stops
$10.92
5 GB
30 days
5 GB at full speed, then data stops
$10.19

Japan Wireless speed and data rules

Japan Wireless data rules by plan type
Data at full speedWhen it runs outPlans
3 GB a daySlows to 256 kbps until midnight Japan timeMessages, maps and slow web pages, no video30 plans
1 to 50 GBData stops24 plans
UnlimitedNo daily cap, fair-use policy applies21 plans
12 to 30 GBSlows down for the rest of the plan, speed not stated4 plans

Japan Wireless: “after 3GB, speed drops to 256 kbps until midnight JST reset” Source

Japan Wireless ratings from customer reviews

21 reviews on Trustpilot, written 25 Mar 2026 to 12 Nov 2026. 4 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.

Review rating3.6 out of 5The mean of the ratings below

Japan Wireless ratings by aspect
AspectRatingReviews that mention it
SpeedNot enough reviews3 reviews
Coverage3.6 out of 515 reviews
Setup3.6 out of 510 reviews
SupportNot enough reviews2 reviews
ValueNot enough reviews2 reviews
AppNot enough reviews0 reviews
Data problemsNot enough reviews
Refund problemsNot enough reviews

Japan Wireless speed tests in Japan

No published speed tests of Japan Wireless in Japan.

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.

  • NTT Docomo
    Download
    50.5 MbpsQ3 2025
    Time on 5G
    51.4%
  • KDDI (au)
    Download
    67.85 Mbps
    Time on 5G
    48.8%
Ookla speeds for each network's own customers
NetworkDownload5G downloadTime on 5GLatency
NTT Docomo50.5 MbpsQ3 2025Not published51.4%Not published
KDDI (au)67.85 MbpsNot published48.8%Not published

Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026; Ookla Speedtest Intelligence Q3 2025 via TelecomsTechNews, 15 Dec 2025.