How many movies have Tsutomu Yamada and Yôko Natsu collaborated on?

They have worked on 2 movies together! Their first movie together was Semi-dokyumento: Chikan no susume (1976) while their highest rated movie together was Dokyumento poruno: Inzetsu maruhi hakusho (1976). They have not worked together since Dokyumento poruno: Inzetsu maruhi hakusho (1976).