How many movies have Hiroshi Kobayashi and Hiroyuki Horiuchi collaborated on?

They have worked on 3 movies together! Their first movie together was Road to Ninja: Naruto the Movie (2012) while their highest rated movie together was Maquia: When the Promised Flower Blooms (2018). They have not worked together since Saga of Tanya the Evil: The Movie (2019). They are most known for their fantasy films together.