How many movies have Masaaki Hirao and Noriyuki Higashiyama collaborated on?

They have worked on 8 movies together! Their first movie together was Hissatsu Shigotonin 2007 (2007) while their highest rated movie together was Hissatsu shigotonin 2009 (2009). They have not worked together since Deadly Professional 2023 (2023).