eSIM for Japan

BambooSIM Japan eSIM

4.1 out of 5 review rating, from(25 reviews)Global reseller51 plans from $5.98

51 plans on Docomo, au, Rakuten Mobile and SoftBank. 5 GB for a week from US$9.98. Prices checked .

Is BambooSIM good for Japan?

BambooSIM runs on Docomo, au, Rakuten Mobile and SoftBank, 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$9.98, the 25th cheapest of the 60 providers with a week plan. Hotspot allowed on some plans. 29 unlimited plans. Review rating 4.1 out of 5 from 25 customer reviews. How we rank BambooSIM.

Japan plans

DataPriceCompare
3 GB
10 days
3 GB at full speed, then slower for the rest of the plan
$5.98
3 GB
10 days
3 GB at full speed, then slower for the rest of the plan
$7.98
3 GB
30 days
$8.99
5 GB
15 days
5 GB at full speed, then slower for the rest of the plan
$9.98
5 GB
15 days
5 GB at full speed, then slower for the rest of the plan
$11.98
5 GB
30 days
$11.99
10 GB
30 days
10 GB at full speed, then slower for the rest of the plan
$16.98
10 GB
30 days
$16.99
10 GB
30 days
10 GB at full speed, then slower for the rest of the plan
$20.98
12 GB
4 days
$10.60
15 GB
30 days
15 GB at full speed, then slower for the rest of the plan
$32.98
20 GB
21 days
$29.95

BambooSIM speed and data rules

BambooSIM data rules by plan type
Data at full speedWhen it runs outPlans
UnlimitedNo daily cap, fair-use policy applies21 plans
3 to 50 GBSlows down for the rest of the plan, speed not stated13 plans
UnlimitedTop speed 10 MbpsNo daily cap, fair-use policy appliesHD video8 plans
3 to 30 GBBambooSIM doesn't say5 plans
12 to 30 GBBambooSIM doesn't say4 plans

BambooSIM: “Speeds are reduced after this allowance for the remaining validity” Source

BambooSIM ratings from customer reviews

25 reviews: 23 on Trustpilot, 1 on Productreview and 1 on the App Store, written 11 Jun 2025 to 27 Oct 2026. 1 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.

Review rating4.1 out of 5The mean of the ratings below

BambooSIM ratings by aspect
AspectRatingReviews that mention it
SpeedNot enough reviews1 review
Coverage4.0 out of 514 reviews
Setup4.2 out of 510 reviews
Support4.2 out of 511 reviews
ValueNot enough reviews6 reviews
AppNot enough reviews2 reviews
Data problemsNot enough reviews
Refund problemsNot enough reviews

BambooSIM speed tests in Japan

No published speed tests of BambooSIM 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%
  • SoftBank
    Download
    73.78 Mbps
    5G download
    153.55 Mbps
    Time on 5G
    41.4%
    Latency
    45 ms
  • Rakuten Mobile
    Download
    53.54 MbpsQ3 2025
    5G download
    124.59 Mbps
    Time on 5G
    37.4%
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
SoftBank73.78 Mbps153.55 Mbps41.4%45 ms
Rakuten Mobile53.54 MbpsQ3 2025124.59 Mbps37.4%Not published

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