History
The station opened on 1 May 1929 as Murayama-kōen Station, the terminus of the Musashino Railway's Yamaguchi Line built to bring sightseers to the new Murayama Reservoir. It was renamed Murayama-Chosuichi-giwa on 1 March 1933 and Murayama on 1 April 1941, the wartime change disguising the strategically sensitive reservoir. Service was suspended in February 1944 when the line was designated non-essential. The line reopened on 7 October 1951, the station was moved 300 metres toward Nishi-Tokorozawa and renamed Sayamako. In November 1978 it was relocated another 300 metres toward Nishi-Tokorozawa to a three-platform, six-track layout for the new Seibu baseball stadium, and was renamed Seibu-Kyūjō-mae on 25 March 1979. The new Yamaguchi Line 'Leo Liner' platforms were added on 25 April 1985.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-22.
Notes
Although the next-door Seibu Dome has changed branding several times — Seibu Lions Stadium, Seibu Dome, MetLife Dome and now Belluna Dome — the station's own name has stayed 'Seibu-Kyūjō-mae' since 1979.