In 1998, Nishimoto received the Idemitsu Music Award. Idemitsu Music Award was first awarded in 1964 to commemorate the 25th Anniversary of the start of a television program, Untitled Concert (Daimei no Nai Ongakukai). The award is presented to a promising musician who has made notable performances throughout the year. The award's purpose is to provide support to upcoming talented musicians continue their musical career. The award is regarded highly for its philanthropic purpose.