GTN Mobile Japan eSIM
10 plans on Docomo. 5 GB for a week from US$18.79. Prices checked .
Is GTN Mobile good for Japan?
GTN Mobile runs on 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$18.79, the 46th cheapest of the 60 providers with a week plan. 5G on some plans. Hotspot allowed. A Japanese phone number on some plans. How we rank GTN Mobile.
Japan plans
Shown in USD, converted from JPY at ECB rates of
| Data | Price | Compare |
|---|---|---|
10 GB 30 days 10 GB at full speed, then 200 kbps for the rest of the plan | $18.79 | |
10 GB 30 days 10 GB at full speed, then 200 kbps for the rest of the plan | $51.66 | |
10 GB 60 days 10 GB at full speed, then 200 kbps for the rest of the plan | $92.99 | |
10 GB 90 days 10 GB at full speed, then 200 kbps for the rest of the plan | $134.31 | |
30 GB 7 days 30 GB at full speed, then 200 kbps for the rest of the plan | $18.79 | |
30 GB 30 days 30 GB at full speed, then 200 kbps for the rest of the plan | $75.77 | |
30 GB 60 days 30 GB at full speed, then 200 kbps for the rest of the plan | $123.98 | |
30 GB 90 days 30 GB at full speed, then 200 kbps for the rest of the plan | $172.20 | |
50 GB 30 days 50 GB at full speed, then 200 kbps for the rest of the plan | $31.31 | |
135 GB 90 days 135 GB at full speed, then 200 kbps for the rest of the plan | $62.62 |
GTN Mobile speed and data rules
| Data at full speed | When it runs out | Plans |
|---|---|---|
| 10 to 135 GB | Slows to 200 kbps for the rest of the planMessages and maps only | 10 plans |
GTN Mobile: “If the data limit is exceeded, the connection speed will be reduced to 200kbps.” Source
GTN Mobile ratings from customer reviews
2 reviews on the App Store, written 31 Mar 2025 to 25 Dec 2025. 0 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 | 0 reviews |
| Coverage | Not enough reviews | 1 review |
| Setup | Not enough reviews | 0 reviews |
| Support | Not enough reviews | 0 reviews |
| Value | Not enough reviews | 0 reviews |
| App | Not enough reviews | 1 review |
| Data problems | Not enough reviews | |
| Refund problems | Not enough reviews |
GTN Mobile speed tests in Japan
No published speed tests of GTN Mobile in Japan.
How fast this network is 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%
| Network | Download | 5G download | Time on 5G | Latency |
|---|---|---|---|---|
| NTT Docomo | 50.5 MbpsQ3 2025 | Not published | 51.4% | Not published |
Sources: Ookla Speedtest Connectivity Report H1 2026 via TelecomLead, 17 Sept 2026; Ookla Speedtest Intelligence Q3 2025 via TelecomsTechNews, 15 Dec 2025.
