History
Horinouchi Station opened on 1 April 1930 as Yokosuka-Horinouchi Provisional Station (横須賀堀内仮駅) on the Shōnan Electric Railway, sited some 180 m closer to Yokosuka-Chūō than the current location. In June 1936 it was upgraded to a full station. On 1 November 1941 the Shōnan Electric Railway and Keihin Electric Railway merged; on 1 May 1942 the merged operator was absorbed into the Tokyo Yokohama Electric Railway (the wartime 'Great Tokyu'). On 1 December 1942 the Kurihama Line opened as far as Kurihama Provisional Station (now Keikyū-Kurihama), and the station was relocated to its present site. With the dissolution of the wartime Tokyu, Keihin Kyūkō Electric Railway was re-established on 1 June 1948. The station took its present name on 1 September 1961. Service was upgraded from limited-express to rapid-express stop on 31 July 1999; the 'Seagull Flew' arrival-melody was introduced on 21 November 2008; a new station building was built in 2017. Station number KK61 was assigned on 21 October 2010.
History summarized from Japanese & English Wikipedia · last reviewed 2026-06-09.
Where the English and Japanese sources differ, this account follows the Japanese source.
Notes
Horinouchi is an island-platform-by-two-platform ground-level station with four tracks; the ticket gates sit below the platforms because of the sloping terrain. The Main Line and the Kurihama Line diverge by a flat crossing on the Uraga side. Despite being the Kurihama Line's origin, no holding sidings exist here, and most Kurihama Line trains through-run onto the Main Line towards Yokohama/Shinagawa; a single crossover near the Shinagawa end allows early-morning and night terminating trains and depot-bound deadheads to reverse on the up Main Line. Of the four platforms, track 1 is Uraga-bound only, track 2 is Keikyū-Kurihama-bound (and partly Uraga-bound), track 3 is for up Uraga-direction arrivals, and track 4 for up Keikyū-Kurihama-direction arrivals. Only track 2 is connected for both Main Line and Kurihama Line through-running, so down-Main-Line express-local connections are possible but the others are not. The approach melody is an arrangement by Hiroshi Shiozuka of Machiko Watanabe's signature song 'Seagull Flew' (Watanabe is from Miharu-chō in Yokosuka): the down-platform uses the B-melody, the up-platform the chorus. The Kanazawa Bunko Track Maintenance section and other facility offices are located in the station precincts.