How many movies have Hideo Kawauchi and Osamu Kobayashi collaborated on?

They have worked on 4 movies together! Their first movie together was There Goes Our Hero: The Heat of the Pennant Race (1980) while their highest rated movie together was Tsushima Maru: Goodbye, Okinawa (1982). They have not worked together since Tsushima Maru: Goodbye, Okinawa (1982). They are most known for their animation films together.