How many movies have Kousaku Taniguchi and Shunsuke Masuda collaborated on?

They have worked on 2 movies together! Their first movie together was Sword Art Online the Movie – Progressive – Aria of a Starless Night (2021) and was their highest rated movie together. They have not worked together since That Time I Got Reincarnated as a Slime the Movie: Scarlet Bond (2022).