The night of the day in which the festival is held, an emperor goes to the Kairyu-den building, taking Omi no oyu for purification, wearing Saifuku (priestly vestments), and after that, in the late-evening, goes into the Yuki-den building (the figure of Chigi [ornamental crossbeams on the gable of a Shinto shrine] is Sotosogi, or the ends of the former are terminated with a vertical cut, and is same as that of the Outer Shrine of Ise-jingu).
祭の当夜、天皇は廻立殿（かいりゅうでん）に渡御し、小忌御湯（おみのおゆ）で潔斎して斎服を着け、深夜、悠紀殿（千木は伊勢神宮外宮と同じ外削ぎ）に入る。