How many movies have Ryota Nakae and Yoshikazu Iwanami collaborated on?

They have worked on 6 movies together! Their first movie together was The Garden of Sinners: Overlooking View (2007) while their highest rated movie together was The Garden of Sinners: Paradox Spiral (2008). They have not worked together since The Garden of Sinners: Oblivion Recording (2008). They are most known for their animation films together.