Travelsim Asia Japan eSIM
6 plans on Docomo, au, SoftBank and Rakuten Mobile. 5 GB for a week from US$9.99. Prices checked .
Is Travelsim Asia good for Japan?
Travelsim Asia runs on Docomo, au, SoftBank and Rakuten Mobile, 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$9.99, the 26th cheapest of the 60 providers with a week plan. 5G on every plan. Hotspot allowed. How we rank Travelsim Asia.
Japan plans
| Data | Price | Compare |
|---|---|---|
1 GB 7 days | $3.49 | |
3 GB 15 days | $6.99 | |
5 GB 30 days | $9.99 | |
10 GB 30 days | $15.99 | |
20 GB 30 days | $22.99 | |
50 GB 30 days | $34.99 |
Travelsim Asia speed and data rules
Travelsim Asia doesn't say what happens when a plan's full-speed data runs out.
Travelsim Asia: “no daily cap or allowance-based speed reduction” Source
Travelsim Asia ratings from customer reviews
21 reviews on Trustpilot, written 6 Dec 2024 to 3 Nov 2026. 3 of them are about a trip to Japan. Each rating needs at least 10 reviews that mention it.
| Aspect | Rating | Reviews that mention it |
|---|---|---|
| Speed | Not enough reviews | 3 reviews |
| Coverage | Not enough reviews | 5 reviews |
| Setup | Not enough reviews | 8 reviews |
| Support | Not enough reviews | 3 reviews |
| Value | Not enough reviews | 1 review |
| App | Not enough reviews | 2 reviews |
| Data problems | Not enough reviews | |
| Refund problems | Not enough reviews |
Travelsim Asia speed tests in Japan
No published speed tests of Travelsim Asia 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%
| 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 |
| Rakuten Mobile | 53.54 MbpsQ3 2025 | 124.59 Mbps | 37.4% | Not published |
Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026; Ookla Speedtest Intelligence Q3 2025 via TelecomsTechNews, 15 Dec 2025.
