How many movies have Kiyoshi Kobayashi and Satoshi Hirayama collaborated on?

They have worked on 19 movies together! Their first movie together was Lupin the Third: The Hemingway Papers (1990) while their highest rated movie together was Lupin the Third: Prison of the Past (2019). They have not worked together since Lupin the Third: Prison of the Past (2019). They are most known for their animation films together.