How many movies have Fumihiko Tachiki and Shu Watanabe acted in together?

They have worked on 5 movies together! Their first movie together was Kamen Rider W Forever: A to Z/The Gaia Memories of Fate (2010) and was their highest rated movie together. They have not worked together since Kamen Rider × Kamen Rider Wizard & Fourze: Movie Wars Ultimatum (2012). They are most known for their science fiction films together.