| Opened | 1895 - 1898 | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Hizen-Yamaguchi | JR Kyūshū: Nagasaki Hon | 0.0 | Kōhoku-machi | Saga |
| Map | Map | Takeo-onsen | | 13.7 | Takeo-shi | |
| Map | Map | Arita | Matsuura: Nishi-kyūshū | 28.2 | Arita-machi | |
| Map | Map | Haiki | JR Kyūshū: Ōmura | 39.9 | Sasebo-shi | Nagasaki |
| Map | Map | Sasebo | Matsuura: Nishi-kyūshū | 48.8 | Sasebo-shi |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Limited Express Tokkyū 特急 | Huis ten Bosch ハウステンボス | Hakata - Tosu - Hizen-Yamaguchi - Haiki - Huis ten bosch Runs togeher with LEX Midori between Hakata and Haiki | 5 | 1h44 | 65 km/h |
| Midori みどり | Hakata - Tosu - Hizen-Yamaguchi - Sasebo | 16 | 1h48 | 65 km/h | |
| Rapid Kaisoku 快速 | Seaside Liner シーサイドライナー | Nagasaki - Isahaya - Haiki - Sasebo | 15 | 1h38 | 50 km/h |
| Local Futsū 普通 | Shimonoseki - Hakata - Tosu - Hizen-Yamaguchi - Haiki | 1 | 5h14 | 36 km/h | |
| Tosu - Hizen-Yamaguchi - Sasebo | 1 | 1h52 | 47 km/h | ||
| Tosu - Hizen-Yamaguchi - Haiki | 4 | 1h35 | 50 km/h | ||
| Hizen-Yamaguchi - Sasebo | 7 | 1h08 | 43 km/h | ||
| Hizen-Yamaguchi - Haiki | 2 | 48 min | 50 km/h | ||
| Nagasaki - Nagasaki (old) line - Isahaya - Haiki - Sasebo | 9 | 2h03 | 43 km/h | ||
| Isahaya - Haiki - Sasebo | 1 | 1h16 | 45 km/h | ||
| Haiki - Sasebo - Nishi-kyūshū line - Imari | 1 | 3h01 | 30 km/h | ||
| Haiki - Sasebo | 4 | 13 min | 41 km/h |