Most of the line overlaps with a railway line opened on an unknown date by the
Imperial Japanese Army Railways and Shipping Section used to connect military facilities. The line had numerous sharp curves to train the drivers, which also led to the Matsudo line sharing a similar trait. Although the
rail profile of the line was sold to the
Seibu Railway after the section disbanded following Japanese capitulation, the track bed remained in place. Seibu Railway and the
Keisei Electric Railway, which both had hired former Railways and Shipping Section personnel, competed to gain approval from the
Supreme Commander for the Allied Powers (GHQ) to construct a railway line using the track bed. The latter gained approval in March 1946 as they had their base of operation in
Chiba prefecture. The
Shin-Keisei Electric Railway was established on 23 October 1946 The
Yakuendai–
Takifudo section was reopened in 1948, and extended to
Hatsutomi the following year. The reopened sections were regauged to in October 1953, and the entire line was reopened as a single-track line by 21 April 1955. In August 1959, the line was again regauged, this time to to match the standard gauge used by
Keisei Electric Railway. which was completed on 1 April 2025. Stations were renumbered to KS-66 at Shin-Tsudanuma through KS-88 at Matsudo. The restructuring was the result of revenue loss owing to the effects of COVID-19 on public transportation. == Operations ==