The Seibu Chichibu Line is a railway line in Saitama, Japan. It is an extension of the Seibu Ikebukuro Line, and connects Agano Station and Seibu-Chichibu Station. It is managed by Seibu Railway.The entire line was opened on October 14, 1969 after over two years of construction, considerably shortening the travel time between Chichibu and Tokyo. Twenty years later, on April 1, 1989, a connection to the Chichibu Main Line opened, and through service began. On March 28, 1996, freight services between Higashi-Yokoze freight terminal and Shin-Akitsu (on the Seibu Ikebukuro Line) ceased. On March 12, 2003, one-man operation began.