How many movies have Tomoyuki Iwasaki and Toshiatsu Kôzuma collaborated on?

They have worked on 10 movies together! Their first movie together was Sekuhara shûshoku mensetsu: Joshidai nama naburi (1997) while their highest rated movie together was Gibo no onanii: Hatsujô roshutsu (1997). They have not worked together since Innyo Ranbu: Battle Do-waisetsu (2001).