is an interchange passenger railway station in the city of Chà Âshi, Chiba, Japan, operated by the East Japan Railway Company (JR East) and also used by the private railway operator Choshi Electric Railway.
Chà Âshi Station is the eastern terminal station of the Sà Âbu Main Line and serves some through trains on the Narita Line to and . It is from the western terminus of the Sà Âbu Main Line at Tokyo Station. It also forms the terminus of the privately operated Chà Âshi Electric Railway Line to .
The JR East station facilities consist of one side platform and one island platform serving three tracks. A bay platform is located between the JR platforms 2 and 3 for Choshi Electric Railway trains. The station has a "Midori no Madoguchi" staffed ticket office.
Chà Âshi Station opened on 1 June 1897 as a station on the Sà Âbu Railway. On 1 September 1907, the Sà Âbu Railway was nationalized, becoming part of the Japanese Government Railway (JGR).
The Chà Âshi Electric Railway Line from Choshi to opened on 5 July 1923, using the trackbed and infrastructure of the earlier , which operated between Chà Âshi and from December 1913 to November 1917. The original station building was replaced by a new two-storey wood-frame-and-mortar building in 1936. An additional platform was added at the same time, and a new underground passage was opened linking the new platform. The 1936 station building lasted only nine years, as it was destroyed in 1945 by fire during World War II. The third-generation station building was completed in January 1948, and a further platform was added at the same time, creating the three-platform arrangement that continues to this day.
After World War II, JGR became the Japanese National Railways (JNR). Scheduled freight operations were suspended from 31 March 1978. The station was absorbed into the JR East network upon the privatization of JNR on 1 April 1987.
A roof was added to the entrance to the Choshi Electric Railway platform in December 1974, and this was replaced by the present-day Dutch-style building in November 1990.
In fiscal 2019, the JR portion of the station was used by an average of 3045 passengers daily (boarding passengers only). In fiscal 2018, the Choshi Electric Railway station was used by an average of 384 passengers daily (boarding passengers only). The passenger figures for previous years are as shown below.
The following long-distance buses operate from Choshi Station.