| Opened | 1906 |
| Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Okaya | JR East: Chūō Hon (East) | 0.0 | Okaya-shi | Nagano |
| Map | Map | Tatsuno | JR Central: Iida | 9.5 | Tatsuno-machi | |
| Map | Map | Shiojiri | JR Central: Chūō Hon (West), JR East: Chūō Hon (East), JR East: Shinonoi | 27.7 | Shiojiri-shi |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Rapid Kaisoku 快速 | Misuzu | Nagano - Shinonoi line - Chūō line - Okaya - Tatsuno - Iida line - Tenryūkyō | 1 | 5h22 | 33 km/h |
| Nagano - Shinonoi line - Chūō line - Okaya - Tatsuno - Iida line - Iida | 2 | 4h06 | 40 km/h | ||
| Local Futsū 普通 | Chino - Okaya - Tatsuno - Iida line - Hiraoka | 1 | 4h25 | 29 km/h | |
| Chino - Okaya - Tatsuno | 1 | 41 min | 36 km/h | ||
| Kamisuwa - Okaya - Tatsuno - Iida line - Toyohashi | 2 | 6h22 | 34 km/h | ||
| Kamisuwa - Okaya - Tatsuno - Iida line - Tenryūkyō | 1 | 3h35 | 27 km/h | ||
| Kamisuwa - Okaya - Tatsuno - Iida line - Komagane | 1 | 1h36 | 30 km/h | ||
| Okaya - Shiojiri - Matsumoto | 1 | 53 min | 46 km/h | ||
| Okaya - Tatsuno - Iida line - Toyohashi | 1 | 5h54 | 35 km/h | ||
| Okaya - Tatsuno - Iida line - Tenryūkyō | 4 | 2h51 | 31 km/h | ||
| Okaya - Tatsuno - Iida line - Iida | 2 | 2h10 | 35 km/h | ||
| Okaya - Tatsuno - Iida line - Ina-Fukuoka | 1 | 1h29 | 29 km/h | ||
| Okaya - Tatsuno - Iida line - Komagane | 3 | 1h15 | 32 km/h | ||
| Okaya - Tatsuno | 1 | 11 min | 52 km/h | ||
| Tatsuno - Shiojiri - Nagano | 1 | 1h56 | 49 km/h | ||
| Tatsuno - Shiojiri - Matsumoto | 1 | 39 min | 48 km/h | ||
| Tatsuno - Shiojiri | 9 | 21 min | 52 km/h |
