| Railway | Line | Linetype |
| Tosa Kuroshio | Asa (Gomen-Nahari) | Non JR railway |
| Nakamura | Non JR railway | |
| Sukumo | Non JR railway |
| Opened | July 1, 2002 | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Kōchi | | -10.4 | Kōchi-shi | Kōchi |
| Map | Map | Gomen | JR Shikoku: Dosan | 0.0 | Nankoku-shi | Kōchi |
| Map | Map | Gomenmachi | Tosaden: Gomen | 1.1 | Nankoku-shi | |
| Map | Map | Noichi | | 5.7 | Kōnan-shi | |
| Map | Map | Akaoka | | 9.3 | Kōnan-shi | |
| Map | Map | Aki | | 27.7 | Aki-shi | |
| Map | Map | Nahari | | 42.7 | Nahari-chō |
| Type | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Rapid Kaisoku 快速 | Kōchi - Gomen - Nahari | 6 | 1h10 | 46 km/h |
| Kōchi - Gomen - Aki | 1 | 51 min | 45 km/h | |
| Gomen - Aki | 1 | 30 min | 55 km/h | |
| Local Futsū 普通 | Kōchi - Gomen - Nahari | 6 | 1h22 | 39 km/h |
| Kōchi - Gomen - Aki | 3 | 1h00 | 38 km/h | |
| Gomen - Nahari | 3 | 1h04 | 40 km/h | |
| Gomen - Aki | 6 | 41 min | 41 km/h | |
| Gomen - Akaoka | 1 | 15 min | 37 km/h | |
| Aki - Nahari | 4 | 20 min | 45 km/h |
| Opened | 1963 | Kubokawa - Tosa-Saga as JNR Nakamura line | Owner change | 1988 | JR > Tosa Kuroshio Railway |
| 1970 | Tosa-Saga - Nakamura | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Kubokawa | JR Shikoku: Dosan | 0.0 | Shimanto-chō | Kōchi |
| Map | Map | Wakai | JR Shikoku: Yodo | 4.4 | Shimanto-chō | |
| Map | Map | Tosa-Saga | | 20.8 | Kuroshio-chō | |
| Map | Map | Nakamura | Tosa Kuroshio: Sukumo | 43.0 | Shimanto-shi |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Limited Express Tokkyū 特急 | Nampu 南風 | Okayama - Kōchi - Kubokawa - Nakamura - Sukumo | 3 | 4h53 | 65 km/h |
| Okayama - Kōchi - Kubokawa - Nakamura | 4 | 4h21 | 68 km/h | ||
| Shimanto しまんと | Takamatsu - Yosan and Dosan lines - Kōchi - Kubokawa - Nakamura | 1 | 4h00 | 69 km/h | |
| Ashizuri あしずり | Kōchi - Kubokawa - Nakamura - Sukumo | 1 | 2h36 | 53 km/h | |
| Kōchi - Kubokawa - Nakamura | 1 | 1h41 | 68 km/h | ||
| Local Futsū 普通 | Kubokawa - Nakamura - Sukumo | 4 | 1h35 | 42 km/h | |
| Kubokawa - Nakamura | 5 | 57 min | 45 km/h |
| Opened | 1997 | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Nakamura | Tosa Kuroshio: Nakamura | 0.0 | Shimanto-shi | Kōchi |
| Map | Map | Sukumo | | 23.6 | Sukumo-shi |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Limited Express Tokkyū 特急 | Nampu 南風 | Okayama - Kōchi - Kubokawa - Nakamura - Sukumo | 3 | 4h53 | 65 km/h |
| Ashizuri あしずり | Kōchi - Kubokawa - Nakamura - Sukumo | 1 | 2h36 | 53 km/h | |
| Local Futsū 普通 | Kubokawa - Nakamura - Sukumo | 4 | 1h35 | 42 km/h | |
| Nakamura - Sukumo | 7 | 30 min | 47 km/h |
