How many movies have Hideo Yumoto and Yukio Horikita collaborated on?

They have worked on 4 movies together! Their first movie together was Last Days of Edo (1941) while their highest rated movie together was Lone Wolf and Cub: Baby Cart in Peril (1972). They have not worked together since Lone Wolf and Cub: White Heaven in Hell (1974). They are most known for their drama films together.