| Railway | Line | Linetype |
| JR Hokkaidō | Hidaka Hon | JR railway |
| Muroran Hon | JR railway | |
| Muroran Hon (Branch) | JR railway |
| Opened | 1913 - 1926 | Tomakomai - Shizunai (762 mm) | Opened | 1933 - 1937 | Shizunai - Samani |
| 1929 - 1931 | Converted to 1067 mm | Tracks | Single track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Tomakomai | JR Hokkaidō: Muroran Hon | 0.0 | Tomakomai-shi | Hokkaidō |
| Map | Map | Mukawa | | 30.5 | Mukawa-chō | |
| Map | Map | Shizunai | | 82.1 | Shinhidaka-chō | |
| Map | Map | Samani | | 146.5 | Samani-chō |
| Type | Origin - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Local Futsū 普通 | Tomakomai - Mukawa | 2 | 28 min | 65 km/h |
| Tomakomai - Shizunai | 3 | 1h32 | 54 km/h | |
| Tomakomai - Samani | 5 | 3h04 | 48 km/h | |
| Shizunai - Samani | 2 | 1h27 | 44 km/h |
| Traction | Non-electric | Oshamanbe - Higashi-Muroran |
| 20 kV 50 Hz AC | Higashi-Muroran - Numanohata |
| Opened | 1923- 1928 | Oshamanbe - Higashi-Muroran | Tracks | Double track | Usu - Nagawa | Tracks | Single track | Mikawa - Yuni |
| 1892 | Higashi-Muroran - Iwamizawa | Single track | Nagawa - Mareppu | Double track | Yuni - Kuriyama | |||
| Tracks | Double track | Oshamanbe - Tōya | Double track | Mareppu - Mikawa | Single track | Kuriyama - Iwamizawa | ||
| Single track | Tōya - Usu |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Oshamanbe | JR Hokkaidō: Hakodate Hon | 0.0 | Oshamanbe-chō | Hokkaidō |
| Map | Map | Toyoura | | 36.1 | Toyoura-chō | |
| Map | Map | Tōya | | 41.5 | Tōyako-chō | |
| Map | Map | Usu | | 46.6 | Date-shi | |
| Map | Map | Nagawa | | 51.5 | Date-shi | |
| Map | Map | Datemonbetsu | | 54.5 | Date-shi | |
| Map | Map | Mareppu | | 60.6 | Date-shi | |
| Map | Map | Higashi-Muroran | JR Hokkaidō: Muroran Hon (Branch) | 77.2 | Muroran-shi | |
| Map | Map | Noboribetsu | | 94.7 | Noboribetsu-shi | |
| Map | Map | Hagino | | 107.8 | Shiraoi-chō | |
| Map | Map | Itoi | | 130.6 | Tomakomai-shi | |
| Map | Map | Tomakomai | JR Hokkaidō: Hidaka Hon | 135.2 | Tomakomai-shi | |
| Map | Map | Numanohata | JR Hokkaidō: Chitose | 144.0 | Tomakomai-shi | |
| Map | Map | Oiwake | JR Hokkaidō: Sekishō | 170.8 | Abira-chō | |
| Map | Map | Mikawa | | 178.8 | Yuni-chō | |
| Map | Map | Yuni | | 186.4 | Yuni-chō | |
| Map | Map | Kuriyama | | 191.5 | Kuriyama-chō | |
| Map | Map | Iwamizawa | JR Hokkaidō: Hakodate Hon | 211.0 | Iwamizawa-shi |
| Type | Name | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|---|
| Limited Express Tokkyū 特急 | Super Hokuto スーパー北斗 | Hakodate - Hakodate line - Oshamanbe - Tomakomai - Chitose line - Sapporo | 7 | 3h00 | 106 km/h |
| Hokuto 北斗 | Hakodate - Hakodate line - Oshamanbe - Tomakomai - Chitose line - Sapporo | 4 | 3h29 | 91 km/h | |
| Suzuran すずらん | Muroran (local train) - Higashi-Muroran - Tomakomai - Chitose line - Sapporo | 5 | 1h38 | 83 km/h | |
| Express Kyūkō 急行 | Hamanasu はまなす | Aomori - Hakodate - Hakodate line - Oshamanbe - Tomakomai -Chitose line - Sapporo Overnight train | 1 | 7h25 | 65 km/h |
| Sleeper Limited Express Shindai tokkyū 寝台特急 | Hokutosei 北斗星 | Ueno Tōkyō - Sendai - (no stops) - Hakodate - Sapporo | 1 | 16h12 | 75 km/h |
| Cassiopeia カシオペア | Ueno Tōkyō - Morioka - (no stops) - Hakodate - Sapporo | 3-4 times/week | 17h12 | 71 km/h | |
| Twilight Express トワイライトエクスプレス | Ōsaka - Hakodate line - Tōya - Tomakomai - Chitose line - Sapporo | 4-7 times/week | 22h02 | 68 km/h | |
| Local Futsū 普通 | Oshamanbe - Tomakomai | 2 | 2h51 | 47 km/h | |
| Oshamanbe - Higashi-Muroran One train continues to Muroran | 6 | 1h28 | 53 km/h | ||
| Toyoura - Noboribetsu | 1 | 1h45 | 33 km/h | ||
| Toyoura - Higashi-Muroran | 2 | 51 min | 48 km/h | ||
| Tōya - Higashi-Muroran | 1 | 45 min | 48 km/h | ||
| Datemonbetsu - Higashi-Muroran | 1 | 29 min | 47 km/h | ||
| Muroran - Higashi-Muroran - Tomakomai | 2 | 1h25 | 46 km/h | ||
| Muroran - Higashi-Muroran - Noboribetsu | 2 | 37 min | 40 km/h | ||
| Muroran - Higashi-Muroran ( - Tōya/Oshamanbe) | 3 | 13 min | 32 km/h | ||
| Muroran - Higashi-Muroran | 11 | 13 min | 32 km/h | ||
| Higashi-Muroran - Tomakomai - Chitose line - Sapporo | 1 | 2h31 | 51 km/h | ||
| Higashi-Muroran - Tomakomai | 7 | 1h02 | 56 km/h | ||
| Higashi-Muroran - Noboribetsu | 1 | 28 min | 38 km/h | ||
| Hagino - Tomakomai | 1 | 28 min | 59 km/h | ||
| Itoi - Tomakomai - Iwamizawa | 1 | 1h55 | 42 km/h | ||
| Itoi - Tomakomai | 5 | 6 min | 46 km/h | ||
| Tomakomai - Iwamizawa | 6 | 1h22 | 55 km/h | ||
| Tomakomai - Oriwake - Sekishō line - Shin-Yūbari - Yūbari | 1 | 2h05 | 37 km/h | ||
| Tomakomai - Oriwake | 1 | 39 min | 55 km/h | ||
| Oriwake - Iwamizawa | 1 | 45 min | 54 km/h |
| Opened | 1897 | Tracks | Double track |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Muroran | | 0.0 | Muroran-shi | Hokkaidō |
| Map | Map | Higashi-Muroran | JR Hokkaidō: Muroran Hon | 7.0 | Muroran-shi |