Three Stone River

A well-known play written by Miya Mai. Its about a samurai who believes his wife has an affair with his own brother. He commands a vassal to throw his bother's name into the Three Sides River that leads to the cursed Lake of Sorrows, but the vassal knows the man is innocent, so to avoid the curse he ties the name to three stones. When the samurai makes peace with his brother, the vassal is rewarded for his wisdom.

Because of this play, the peasants living near the Three Sides River, often refer to it as the Three Stone River instead. (Secrets of the Crane, p. 26)