In 1974 he organized the Group of Young Composers ("Shin-Shin-Kai") of which he was chairman for ten years. From 1986 to 2007 he was a professor at the Tokyo National University of Fine Arts and Music, and served as its vice-chancellor from 2002 to 2005.
He has been awarded the Grand Prix of the Commemorative Festival of Music of the Metropolis of Tokyo, the Prix Italia of Radio Italy, the Otaka Prize, the Grand Prix of the Japan Art Festival, the Takei Prize and other honors. He has composed many works on commission, and several concerts dedicated exclusively to his works were held. Most of his works were recorded and published.