How many movies have Manabu Tamura and Masao Maruyama collaborated on?

They have worked on 4 movies together! Their first movie together was Nasu: Summer in Andalusia (2003) while their highest rated movie together was Death Note Relight 2: L's Successors (2009). They have not worked together since Hunter x Hunter: Phantom Rouge (2013). They are most known for their animation films together.