How many movies have Akio Otsuka and Naoki Yamauchi collaborated on?

They have worked on 3 movies together! Their first movie together was Bleach the Movie: The DiamondDust Rebellion (2007) while their highest rated movie together was Hunter x Hunter: Phantom Rouge (2013). They have not worked together since Hunter x Hunter: Phantom Rouge (2013). They are most known for their action films together.