| Railway | Line | Linetype |
| Shared | Seto-Ōhashi | JR railway [Nickname] |
| JR West | Uno | JR railway |
| Honshi-Bisan | JR railway | |
| JR Shikoku | Honshi-Bisan | JR railway |
| Real line name | From - To |
|---|---|
| JR West: Uno | Okayama - Chayamachi |
| JR West: Honshi-Bisan | Chayamachi - Kojima |
| JR Shikoku: Honshi-Bisan | Kojima - Utazu |
| JR Shikoku: Yosan | Utazu - Takamatsu |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Limited Express Tokkyū 特急 | Nampu 南風 | Okayama - Utazu - Tadotsu - Kōchi - Kubokawa - Nakamura - Sukumo | 3 | 4h53 | 65 km/h |
| Okayama - Utazu - Tadotsu - Kōchi - Kubokawa - Nakamura | 4 | 4h21 | 68 km/h | ||
| Okayama - Utazu - Tadotsu - Kōchi | 7 | 2h23 | 75 km/h | ||
| Shiokaze しおかぜ | Okayama - Utazu - Matsuyama - Uchiko - Uchiko line - Iyo-Ōzu - Uwajima | 1 | 4h27 | 70 km/h | |
| Okayama - Utazu - Matsuyama | 14 | 2h38 | 81 km/h | ||
| Uzushio うずしお | Okayama - Utazu - Takamatsu - Tokushima | 2 | 1h58 | 74 km/h | |
| Sleeper Limited Express Shindai tokkyū 寝台特急 | Sunrise Seto サンライズ瀬戸 | Tōkyō - Okayama - Sakaide - Takamatsu | 1 | 9h27 | 85 km/h |
| Rapid Kaisoku 快速 | Marine Liner マリンライナー | Okayama - Sakaide - Takamatsu | 39 | 53 min | 81 km/h |
| Local Futsū 普通 | Okayama - Kojima - Utazu - Kotohira | 2 | 1h31 | 42 km/h | |
| Okayama - Kojima - Utazu - Kan'onji | 2 | 1h54 | 40 km/h |
| Nickname | From - To |
|---|---|
| Seto-Ōhashi | Okayama - Chayamachi |
| Opened | 1910 | Tracks | Double track | Bitchū-Mishima - Kuguhara | |
| Tracks | Single track | Okayama - Bitchū-Mishima | Single track | Kuguhara - Chayamachi |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Okayama | JR West: Sanyō Shinkansen, JR West: Sanyō Hon, JR West: Kibi, JR West: Tsuyama, Okaden: Higashiyama (Hon) [Okayama-ekimae] | 0.0 | Okayama-shi | Okayama |
| Map | Map | Bitchū-Mishima | | 10.2 | Okayama-shi | |
| Map | Map | Kuguhara | | 13.2 | Hayashima-chō | |
| Map | Map | Chayamachi | JR West: Honshi-Bisan | 14.9 | Kurashiki-shi | |
| Map | Map | Uno | | 32.8 | Tamano-shi |
| Type | Origin - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Local Futsū 普通 | Okayama - Uno | 11 | 43 min | 46 km/h |
| Chayamachi - Uno | 14 | 23 min | 47 km/h | |
| Seto-Ōhashi line trains: See above |
| Nickname | From - To |
|---|---|
| Seto-Ōhashi | Chayamachi - Kojima |
| Opened | 1988 | Tracks | Double track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Okayama | | 0.0 | Okayama-shi | Okayama |
| Map | Map | Chayamachi | JR West: Uno | 14.9 | Kurashiki-shi | Okayama |
| Map | Map | Kojima | JR Shikoku: Honshi-Bisan | 27.8 | Kurashiki-shi |
| Type | Origin - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Local Futsū 普通 | Okayama - Kojima | 15 | 34 min | 49 km/h |
| Seto-Ōhashi line trains: See above |
| Nickname | From - To |
|---|---|
| Seto-Ōhashi | Kojima - Utazu |
| Opened | 1988 | Tracks | Double track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Kojima | JR West: Honshi-Bisan | 27.8 | Kurashiki-shi | Okayama |
| Map | Map | Utazu | JR Shikoku: Yosan | 45.9 | Utazu-chō | Kagawa |
