How many movies have Ayumu Anzai and Jin Aketagawa collaborated on?

They have worked on 4 movies together! Their first movie together was Hanasaku Iroha: Home Sweet Home (2013) while their highest rated movie together was Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of the Orion (2019). They have not worked together since Is It Wrong to Try to Pick Up Girls in a Dungeon?: Arrow of the Orion (2019). They are most known for their animation films together.