How many movies have Keiichi Kitagawa and Osamu Tanaka collaborated on?

They have worked on 15 movies together! Their first movie together was The Prickly Mouthed Geisha Part 2 (1960) while their highest rated movie together was The Armed Organization (1971). They have not worked together since The Ando Gang Documentary Film (1973). They are most known for their crime films together.