How many movies have Hikaru Yamamoto and 日達長夫 collaborated on?

They have worked on 2 movies together! Their first movie together was Kamen Rider × Kamen Rider W & Decade: Movie War 2010 (2009) and was their highest rated movie together. They have not worked together since Kamen Rider × Kamen Rider OOO & W Featuring Skull: Movie Wars Core (2010).