How many movies have Kenji Takahashi and Soichiro Hoshi acted in together?

They have worked on 4 movies together! Their first movie together was The Garden of Sinners: A Study in Murder (Part 1) (2007) while their highest rated movie together was The Garden of Sinners: A Study in Murder (Part 2) (2009). They have not worked together since Broken Blade: The Path of Separation (2010). They are most known for their animation films together.