• June 22, 1984 - The Aizu line is opened by
Japanese National Railways. • November 10, 1986 - Aizu Railway Co., Ltd. is established. • 1987: • -Route name, new station name, company badge, etc. are determined. • July 16 - East Japan Railway (JR East) to convert the Aizu line Aizusen opening . • April 27, 1988 -
To-no-Hetsuri Station opens. • October 12, 1990 - 15.4 km of the line is electrified, between and . With this electrification, through services begin with the
Tobu Kinugawa Line,
Tobu Nikko Line, and the
Tobu Isesaki Line. • August 10, 1995 -
Minami-Wakamatsu Station opens. • August 7, 1999 -
Amaya Station was opened. • July 18, 2001 -
Aizu-Sanson-Dojo Station opens. • 2002 • March 23 - Aizu Mount Express begins operation. • August 29 -
Furusato-Koen Station opens. • March 1, 2005 - The express "Minamiaizu" was abolished. Aizu Mount Express starts direct operation to Kinugawa Onsen Station on the Tobu Kinugawa Line. • March 18, 2006 - Aizu Kogen Station was renamed to Aizu Kogen Ozeguchi Station. • 2009: • April 18 - A concert is held outside Yunokami-Onsen station • August 23–24 - Rokujizo Station temporarily opens. • August 23, 24, 2010- Ichinoseiroku Jizoson Station was temporarily opened, in the same location as Rokujizo station the previous year. This station would be opened every year until 2014. • 2012: • March 17 - Aizu Mount Express begins direct operation to
Tobu-Nikko Station. • March 25-The Yume Tour begins operating to
Kinugawa-Onsen Station on the
Tobu Kinugawa Line. • April 21, 2017 - Tobu's limited express Liberty Aizu starts operations to Aizu-Tajima Station. ==Ridership==