| Opened | 1911 - 1922 | Closed | April 1, 2008 | Shimabara-Gaikō - Kasuza | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Isahaya | JR Kyūshū: Nagasaki Hon, JR Kyūshū: Ōmura | 0.0 | Isahaya-shi | Nagasaki |
| Map | Map | Hon-Isahaya | | 1.5 | Isahaya-shi | |
| Map | Map | Azuma | | 16.6 | Unzen-shi | |
| Map | Map | Shimabara | | 40.5 | Shimabara-shi | |
| Map | Map | Minami-Shimabara | | 42.3 | Shimabara-shi | |
| Map | Map | Shimabara-Gaikō | | 43.2 | Shimabara-shi | |
| Map | Map | Kazusa | | 78.5 | Minamishimabara-shi |
| Type | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Express Kyūkō 急行 | Isahaya - Shimabara-Gaikō | 5 | 56 min | 46 km/h |
| Isahaya - Minami-Shimabara | 2 | 53 min | 48 km/h | |
| Local Futsū 普通 | Isahaya - Shimabara-Gaikō | 17 | 1h09 | 38 km/h |
| Isahaya - Minami-Shimabara | 6 | 1h06 | 38 km/h | |
| Isahaya - Hon-Isahaya | 14 | 2 min | 45 km/h | |
| Hon-Isahaya - Shimabara-Gaikō | 1 | 1h09 | 36 km/h |
