Occasionally, shamisen or koto would join in kokyu honkyoku, but both of them did so merely as an accompaniment and the ensemble was usually a duet instead of a trio.
胡弓本曲に三味線または箏を合わせることはあったが、これは主に「地」で伴奏する形であり、普通二重奏までで三曲合奏にはしない。