How many movies have Koichi Sonoi and Shinichi Suzuki collaborated on?

They have worked on 6 movies together! Their first movie together was Sure Death! 3 (1986) while their highest rated movie together was Female Ninjas Magic Chronicles 3: Sacred Book of Sexual Positions (1993). They have not worked together since Hissatsu shimatsunin (1997). They are most known for their action films together.