Daigoro Tachibana (橘 大五郎 Tachibana Daigorō), birth name Daisuke Isayama (諌山 大輔 Isayama Daisuke, born 27 January 1987) is one of Heisei era's celebrated onnagata and taishū engeki actor. He is branded as the Taishu Engeki-kai Purinsu (大衆演劇界プリンス, Taishu Engeki's Prince) with the alias "Taishū engeki-kai no Nyūhīrō Tensai Onnagata" (大衆演劇界のニューヒーロー 天才女形, Taishū engeki's New Hero Genius Onnagata) and best remembered as Osei in Takeshi Kitano’s Zatoichi: The Blind Swordsman (2003). He is one of the taishū engeki stars to have become a professional enka recording artist.