How many movies have Eiichi Akiyama and Kazuhiro Oki collaborated on?

They have worked on 4 movies together! Their first movie together was Armored Trooper VOTOMS: Case; Irvine (2010) while their highest rated movie together was My Hero Academia: Heroes Rising (2019). They have not worked together since My Hero Academia: Heroes Rising (2019). They are most known for their action films together.