How many movies have Gorō Naya and Toshimitsu Kobayashi collaborated on?

They have worked on 5 movies together! Their first movie together was Lupin the Third: The Columbus Files (1999) while their highest rated movie together was Lupin the Third: Operation: Return the Treasure (2003). They have not worked together since Lupin the Third: Angel Tactics (2005). They are most known for their tv movie films together.