How many movies have Naohiro Hirakawa and Taisuke Oe collaborated on?

They have worked on 5 movies together! Their first movie together was Peach-butt Sisters: Fragrance of Pubic Hair (2004) while their highest rated movie together was Maid in Japan (2006). They have not worked together since Ijô shiiku: Waisetsu seikô (2012).