Kaisha or gaisha may refer to:
Arts and entertainment Kaisha (The Sopranos), an episode of The Sopranos
Japanese corporate law or gaisha, the Japanese word for "corporation" Kabushiki gaisha, a type of joint-stock company Gōdō gaisha, a type of limited liability company Gōmei gaisha, a type of unlimited partnership company Gōshi gaisha, a type of unlimited liability company Yūgen gaisha, a historic kind of limited liability company
See also Law of Japan#Corporate law