| Opened | 1926 | Aizu line: Aizu-Wakamatsu - Aizu-Bange | Opened | 1963 | Aizu line: Aizu-Kawaguchi - Tadami | Tunnel | 3.712m | Tagokura (Tadami - Tagokura) |
| 1928 | Aizu line: Aizu-Bange - Aizu-Yanaizu | 1971 | Tadami line: Ōshirakawa - Tadami | 6.359m | Rokujurigoe (Tagokura - Oshirakawa) | |||
| 1941 | Aizu line: Aizu-Yanaizu - Aiza-Miyashita | Renamed | 1971 | Aizu line > Tadami line | ||||
| 1942 | Tadami line: Koide - Ōshirakawa | Tracks | Single track | |||||
| 1946 | Aizu line: Aizu-Miyashita - Aizu-Kawaguchi |
| Mapion | Major stations | Connecting lines | Km | City | Prefecture | |
| Map | Map | Aizu-Wakamatsu | JR East: Banetsu-sai | 0.0 | Aizu-Wakamatsu-shi | Fukushima |
| Map | Map | Nishi-Wakamatsu | Aizu Tetsudō: Aizu | 3.1 | Aizu-Wakamatsu-shi | |
| Map | Map | Aizu-Bange | | 21.6 | Aizubange-machi | |
| Map | Map | Aizu-Yanaizu | | 33.3 | Yanaizu-machi | |
| Map | Map | Aizu-Miyashita | | 45.4 | Mishima-machi | |
| Map | Map | Aizu-Kawaguchi | | 60.8 | Kaneyama-machi | |
| Map | Map | Tadami | | 88.4 | Tadami-machi | |
| Map | Map | Tagokura | | 95.0 | Tadami-machi | |
| Map | Map | Ōshirakawa | | 109.2 | Uonuma-shi | Niigata |
| Map | Map | Koide | JR East: Jōetsu | 135.2 | Uonuma-shi |
| Type | Origin - Major stops - Destination | Trains per day | Fastest train | Average speed |
|---|---|---|---|---|
| Local Futsū 普通 | Aizu-Wakamatsu - Koide | 3 | 4h07 | 33 km/h |
| Aizu-Wakamatsu - Aizu-Kawaguchi | 3 | 1h47 | 34 km/h | |
| Aizu-Wakamatsu - Aizu-Bange | 1 | 35 min | 37 km/h | |
| Tadami - Koide | 1 | 1h16 | 37 km/h | |
| Oshirakawa - Koide | 1 | 45 min | 35 km/h |
