How many movies have Kouichi Hashimoto and Yukie Sakou collaborated on?

They have worked on 3 movies together! Their first movie together was Steamboy (2004) and was their highest rated movie together. They have not worked together since Mobile Suit Gundam 00 The Movie: -A Wakening of the Trailblazer- (2010). They are most known for their science fiction films together.