The Aizu-sen is owned by the Aizu Railways company. The line runs through Fukushima Prefecture from Nishi Wakamatsu Station (with trains running through Aizu Wakamatsu Station through to the Tadami-sen) to Aizu Kogen Ozeguchi in Minami Aizu.
Aizu-sen Station names and distances from Nishi Wakamatsu Station to Aizu Kogen Ozeguchi Station, both in Fukushima Prefecture. Aizu Wakamatsu Station and Nanukamachi Station are on the Tadami-sen train line. Trains run through onto this line.