How many movies have Eiichi Ôsawa and Go Nagai collaborated on?

They have worked on 3 movies together! Their first movie together was Legend of the Shadowy Ninja: The Ninja Dragon (1990) while their highest rated movie together was Kekko Kamen Returns (2004). They have not worked together since Kekko Kamen Returns (2004). They are most known for their comedy films together.