Tosa-Nagaoka Station
is a railway station on the Dosan Line in Nankoku, Kōchi Prefecture, Japan. It is operated by JR Shikoku and has the station number "D39".

Lines
The station is served by the JR Shikoku Dosan Line and is located 114.1 km from the beginning of the line at .

Layout
The station, which is unstaffed, consists of a side platform serving a single track. There is a shelter on the platform for waiting passengers. A ramp leads up to the platform from the access road.

Adjacent stations

History
The station opened on 1 May 1952 as a new station on the existing Dosan Line. At that time the station was operated by Japanese National Railways (JNR). With the privatization of JNR on 1 April 1987, control of the station passed to JR Shikoku.