The Noh prevalent during the Muromachi era in Kurokawa in the city of Tsuruoka in Yamagata prefecture. It was passed down through the generations as a performance of offering to the Kasuga Shrine by the shrine parishioners, and preserves traditions not present in the modern forms of the five major Noh schools. There is a kamiza and a shimoza, and 540 Noh plays and 50 kyōgen plays in Kurokawa Noh. 230 masks and 400 costumes are used on stage, and many original documents remain. Kurokawa Noh is one of Japan’s largest and most important traditional arts, and is designated as a significant intangible folk cultural asset by the Japanese government. It is performed at Kasuga Shrine during the Ōgisai Festival on February 1-2.