How many movies have Mitsuru Fukutawara and Yoshikazu Katō collaborated on?

They have worked on 6 movies together! Their first movie together was Sticky Wife, Begging Wife II: While being Watched by her Husband (1997) while their highest rated movie together was Whore Hospital (1997). They have not worked together since Whore Hospital 4: No-Pants Nursing (2001). They are most known for their drama films together.