Morogurui, or "mad" characters, are important in a number of works in this genre, including one by Kanze Motomasa, in which a woman laments the death of her son after his abduction, and another work in which the spirits of two sisters relate a tale of their love for a wandering courtier, The Sumida River and The Pining Wind respectively.
Works written in this genre and set in China include the anonymous Kantan, in which an innkeeper gives a man a pillow, sleeping on which grants him a dream revealing the transience of the world. Morogurui, or "mad" characters, are important in a number of works in this genre, including one by Kanze Motomasa, in which a woman laments the death of her son after his abduction, and another work in which the spirits of two sisters relate a tale of their love for a wandering courtier, The Sumida River and The Pining Wind respectively. The kuri-sashi-kuse section of one work in this genre was adapted into another author's play about a bodhisattva in the guise of a prostitute, Eguchi; those two authors are the early developers of this dramatic genre, Kan'ami and Zeami. For 10 points, the Uba, depicting an old woman, is one of the traditional masks used in what classical Japanese musical theater? 
Works written in this genre and set in China include the anonymous Kantan, in which an innkeeper gives a man a pillow, sleeping on which grants him a dream revealing the transience of the world.
Noh [or Nogaku]