How many movies have Tomoyuki Iwasaki and Yuya Ishikawa collaborated on?

They have worked on 4 movies together! Their first movie together was Kyonyû henshûchô: Yawarakana amami (1999) while their highest rated movie together was A Female Doctor Without Panties: Suck It All Up (2000). They have not worked together since Shisen stalker: Waisetsu nozoki (2001).