How many movies have Chishū Ryū and Isao Suzuki collaborated on?

They have worked on 18 movies together! Their first movie together was Tora-san's Tropical Fever (1980) while their highest rated movie together was Tora-san Plays Daddy (1987). They have not worked together since Tora-san, My Uncle (1989). They are most known for their comedy films together.