How many movies have Kyôsuke Ueno and Takayuki Hirano collaborated on?

They have worked on 4 movies together! Their first movie together was Kokkuri-san: Gekijô-ban (2011) while their highest rated movie together was Corpse Party: Book of Shadows (2016). They have not worked together since Corpse Party: Book of Shadows (2016). They are most known for their horror films together.