How many movies have Seizō Fukumoto and Toshiaki Tsushima collaborated on?

They have worked on 23 movies together! Their first movie together was The Magic Serpent (1966) while their highest rated movie together was Battles Without Honor and Humanity: Deadly Fight in Hiroshima (1973). They have not worked together since Assassination Orders (1984). They are most known for their action films together.