How many movies have Chikao Ohtsuka and Kiyoshi Kobayashi acted in together?

They have worked on 4 movies together! Their first movie together was Lupin the Third: The Legend of the Gold of Babylon (1985) while their highest rated movie together was Crayon Shin-chan: Invoke a Storm! The Kasukabe Boys of the Evening Sun (2004). They have not worked together since Space Pirate Captain Harlock (2013). They are most known for their animation films together.