MicroEsim Japan eSIM
6 plans on SoftBank, au and Docomo. From US$0.81. Prices checked .
Is MicroEsim good for Japan?
MicroEsim runs on SoftBank, au and Docomo, strong in all 10 areas on our coverage map, with good 4G at all 28 rural and mountain places. 5G on some plans. 3 unlimited plans, 3 of them with 500 MB to 1 GB a day at full speed. Review rating 3.9 out of 5 from 33 customer reviews. How we rank MicroEsim.
Japan plans
| Data | Price | Compare | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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1 GB 5 days | $1.17 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1 GB 5 days | $1.21 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Unlimited: 500 MB a day at full speed, then 128 kbps, on 2 of 3 plans | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unlimited 1 day | $0.81 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unlimited 1 day | $0.95 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Unlimited 1 day 1 GB a day at full speed, then 128 kbps | $1.02 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Daily data | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
5 GB a day 1 day 5 GB a day at full speed, then 128 kbps | $1.20 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
MicroEsim speed and data rules
| Data at full speed | When it runs out | Plans |
|---|---|---|
| 500 MB a day | Slows to 128 kbpsMessages and maps only | 2 plans |
| 1 GB a day | Slows to 128 kbpsMessages and maps only | 1 plan |
| 5 GB a day | Slows to 128 kbpsMessages and maps only | 1 plan |
| 1 GB | MicroEsim doesn't say | 2 plans |
MicroEsim: “you can still enjoy unlimited data access at a reduced speed of 128kbps” Source
MicroEsim ratings from customer reviews
33 reviews on Trustpilot, written 12 Jun 2025 to 19 Oct 2026. 1 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.
Review rating3.9 out of 5The mean of the ratings below
| Aspect | Rating | Reviews that mention it |
|---|---|---|
| Speed | Not enough reviews | 4 reviews |
| Coverage | 3.8 out of 5 | 15 reviews |
| Setup | 3.7 out of 5 | 12 reviews |
| Support | Not enough reviews | 9 reviews |
| Value | 4.1 out of 5 | 11 reviews |
| App | Not enough reviews | 4 reviews |
| Data problems | 3.0% of reviews | 1 of 33 reviews reports one |
| Refund problems | 6.1% of reviews | 2 of 33 reviews report one |
MicroEsim speed tests in Japan
No published speed tests of MicroEsim 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
| Network | Download | 5G download | Time on 5G | Latency |
|---|---|---|---|---|
| NTT Docomo | 50.5 MbpsQ3 2025 | Not published | 51.4% | Not published |
| KDDI (au) | 67.85 Mbps | Not published | 48.8% | Not published |
| SoftBank | 73.78 Mbps | 153.55 Mbps | 41.4% | 45 ms |
Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026; Ookla Speedtest Intelligence Q3 2025 via TelecomsTechNews, 15 Dec 2025.
