The Nakayama clan was one of Musashi-shichito Parties (seven parties of samurai in Musashi Province) who had the base in Iruma County, Musashi Province (the neighborhood of present-day Hanno City, Saitama Prefecture).
中山氏は武蔵国入間郡（現在の埼玉県飯能市付近）に本拠のある武藏七党の一つ。