A cherry tree planted on the east side and a mandarin orange tree planted on the west side in the southern garden of the Shishin-den Hall are called Sakon no Sakura and Ukon no Tachibana, respectively because Sakonefu (Left Division of Inner Palace Guards) and Ukonefu (Right Division of Inner Palace Guards) were deployed near each tree.
紫宸殿の南庭には東に桜、西に橘が植えられており、それぞれの近くに左近衛府と右近衛が配陣したため、左近桜、右近橘と称される。