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| (5) | Yamaguchi Central Chūgoku NE Kyūshū Shikoku W |
| (10) | Iwakuni - Hiroshima Fukuoka & Kitakyūshū Nakatsu Matsuyama |
| (15) | Mine Tokuyama |
| (20) | Kitakyūshū |
| (40) | Nagato |
| Name | Major stations | Length (km) |
Comments |
| JR West | |||
| Sanyō Shinkansen | [Hiroshima] - Shin-Iwakuni - Tokuyama - Shin-Yamaguchi - Asa - Shin-Shimonoseki - [Kokura] | 159.5 | |
| Name | Major stations | Length (km) |
Comments |
| JR Kyūshū | |||
| Sanyō Hon | Shimonoseki - [Moji] | 3.2 | |
| JR West | |||
| Gantoku | Iwakuni - Kawanishi - Kushigahama - Tokuyama | 43.7 | |
| Mine | Asa - Mine - Nagatoshi | 46.0 | |
| Onoda | Ubeshinkawa - Inō - Suzumeda - Onoda | 11.6 | |
| Onoda (Motoyama branch) | Suzumeda - Nagato-Motoyama | 2.3 | |
| Sanin Hon | [Masuda] - Nagatoshi - Hatabu - Shimonoseki | 142.9 | |
| Sanin Hon (Senzaki branch) | Nagatoshi - Senzaki | 2.2 | |
| Sanyō Hon | [Ōtake] - Iwakuni - Kushigahama - Tokuyama - Hōfu - Shin-Yamaguchi - Ube - Onoda - Asa - Shin-Shimonoseki - Hatabu - Shimonoseki | 184.6 | |
| Ube | Shin-Yamaguchi - Ubeshinkawa - Inō - Ube | 33.2 | |
| Yamaguchi | Shin-Yamaguchi - Yamaguchi - [Tsuwano] | 57.8 | |
| Name | Major stations | Length (km) |
Comments |
| Nishikigawa | |||
| Nishikigawa Seiryū | Iwakuni - Kawanishi - Mishō - Nishikichō | 32.7 | |
| Area km² | Population | Population density (persons/km²) | Railways
(km) | |
| 6,112 | 1,473,223 | 241 | 720 | |
| Rank | 23 | 25 | 28 | 13 |
