NTT docomo (Japan): 4G and 5G bands
NTT docomo (Japan) runs 4G on B1, B3, B19, B21, B28, B42; B19, B28 are the coverage layer. 5G bands: n78, n79, n1, n28, n257. 5G SA: live (2021-12); RedCap: not launched; 3G: switched off (2026-03-31); 2G: switched off (2012).
Check your module in Japan
Results cover the 4 networks here; the home page checks every country at once.
Bands in detail
| Band | Name | Duplex | Uplink MHz | Downlink MHz | Layer | Checked |
|---|---|---|---|---|---|---|
| B1 | 2100 IMT | FDD | 1920–1980 | 2110–2170 | capacity layer | cross-checked12 |
| B3 | 1800 DCS | FDD | 1710–1785 | 1805–1880 | capacity layer | cross-checked12 |
| B19 | 800 Upper (Japan) | FDD | 830–845 | 875–890 | coverage layer | cross-checked12 |
| B21 | 1500 Upper PDC | FDD | 1447.9–1462.9 | 1495.9–1510.9 | capacity layer | cross-checked12 |
| B28 | 700 APT | FDD | 703–748 | 758–803 | coverage layer | cross-checked12 |
| B42 | 3500 | TDD | 3400–3600 | 3400–3600 | capacity layer | cross-checked12 |
| n78 | 3500 C-Band | TDD | 3300–3800 | 3300–3800 | capacity layer | cross-checked13 |
| n79 | 4700 C-Band | TDD | 4400–5000 | 4400–5000 | capacity layer | cross-checked13 |
| n1 | 2100 IMT | FDD | 1920–1980 | 2110–2170 | capacity layer | single source1 |
| n28 | 700 APT | FDD | 703–748 | 758–803 | coverage layer | single source1 |
| n257 | 28 GHz mmWave | TDD | 26500–29500 | 26500–29500 | capacity layer | single source1 |
Frequencies are from the 3GPP specifications. “Single source” means only one community source lists the band; it is shown but not scored.
Network status
| 5G SA | Live (2021-12)3 |
|---|---|
| RedCap | Not launched |
| LTE-M | Commercial4 |
| NB-IoT | Shut down (2020)5 |
| 2G | Switched off (2012)6 |
| 3G | Switched off (2026-03-31)7 |
Our dongles on this network
Supports B1, B3, B19 (coverage layer). Missing B28 (coverage layer), B21, B42.
Supports B1, B3, B19 (coverage layer). Missing B28 (coverage layer), B21, B42.
Supports B1, B3, B19 (coverage layer), B28 (coverage layer). Missing B21, B42.
5G: 5G bands match, but no commercial RedCap yet (n78)
Sources
- C Frequency checker: Japan Kimovil · 2026-09
- C Japan: frequencies by operator FrequencyCheck · 2026-09
- A Launch of 5G SA on Sub-6 (3.7 GHz / 4.5 GHz) NTT docomo · 2021-12-13
- B Mobile IoT network launches (Nov 2025) GSMA · 2025-11
- B What’s next for NB-IoT in 2025? (incl. NTT Docomo ending NB-IoT in 2020) Eseye · 2025-01-17
- B 2G/3G switch-off sprint in China; Korea’s WCDMA rights expire 2026-12-31 IT Times (IT时报), via 36Kr · 2026-06-08
- A End of feature-phone site; 3G end dates: docomo 2026-03-31, SoftBank 2024-04-15, KDDI 2022-03-31 City of Yokohama · 2026-03-17
