ami Station line was extended to Ichinomiya and the Bs Railway began operations later on, Freight operations were discontinued on July 1, 1971.
The line was extended to Ichinomiya in 1897. On September 1, 1907, the Boso Railway was nationalized and became part of the Japanese Government Railways, which was transformed into the Japanese National Railways (JNR) after World War II. Freight operations were discontinued on July 1, 1971. 
