Ko NAKAHIRA was good at accentuating 'the charm of supporting actors' by casting actors such as Ko NISHIMURA, Osamu TAKIZAWA, Noboru NAKAYA and Asao KOIKE rather than stars who played the leads, and he was called 'A genius who unpredictably casted unpredictable actors' because of his unique sense of casting and sense of fun.
中平康は、主演格のスターよりも、西村晃、滝沢修、仲谷昇、小池朝雄といった俳優を使い「脇の味」を出すことを得意とし、その独特なキャスティングのセンスと遊び心で「意外なところに意外な人物を出す天才」といわれた。