Hideo Kachi (可知 日出男) (born December 17, 1953 in Nakano, Tokyo) is a Japanese musician. He is a player of various woodwind instruments, such as the flute, clarinet, saxophone, bassoon, ocarina, recorder (musical instrument), and others. He is also a singer, and has written his own lyrics. He graduated from Waseda University in the first department of literature. His musical origins came from his participation in the band Geinoh Yamashirogumi, followed by his leadership of "Art Ensemble Green." He has participated in fourteen recitals so far.