Kotsuzumi is a traditional Japanese drum used in various forms of Japanese theater, particularly in Noh and Kabuki. It is a small, hand-held drum made from a wooden body and covered with animal skin on both ends. The drum is played with a stick, producing a deep, resonant sound that enhances the dramatic atmosphere of performances. In Noh theater, the kotsuzumi is often played by musicians who accompany the actors, adding rhythm and emotion to the storytelling. Its unique sound helps convey the mood of the scene, making it an essential instrument in traditional Japanese performing arts.