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

They have worked on 6 movies together! Their first movie together was Molester Diary: A Man Who Kept Stroking Ass (1995) while their highest rated movie together was Molester Diary: A Man Who Kept Stroking Ass 6 (1998). They have not worked together since Molester Diary 6 - A man who keeps stroking asses (1998).