How many movies have Hitomi Nakahara and Ichirô Kojima acted in together?

They have worked on 4 movies together! Their first movie together was Man with the Funky Hat (1961) while their highest rated movie together was Man with a Funky Hat: The 20,000,000 Yen Arm (1961). They have not worked together since 新婚シリーズ　最初が肝心 (1962).