It was also called "Nishi no Chu-mon" (lit. western inner gate) and "Ukon no Jin" (lit. Post of the Right Division of Inner Palace Guards) because it was assigned to serve as a post for the Ukonfu (Right Division of Inner Palace Guards).
西の中門ともいい、右近衛府の陣に充てられたため、右近陣（うこんのじん）ともいう。