How many movies have Masato Katō and Yoichi Nukumizu collaborated on?

They have worked on 5 movies together! Their first movie together was Molester Diary: A Man Who Kept Stroking Ass (1995) and was their highest rated movie together. They have not worked together since 尻を撫でまわしつづけた男 痴漢日記6 (1998).