Ueno Koji is a Japanese composer, musician, arranger and keyboardist. He is noted for his unique style of music.
He graduated from Nihon University's department of music at its faculty of art, and in 1978, began his career in music with his first music ensemble, 8&1/2, after which he worked with the group Halmens between 1979 and 1981.[2] In 1980, Ueno formed the musical group Guernica, noted for its unique form of avant garde music, along with vocalist Jun Togawa and lyricist Keichi Ohta.

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