How many movies have Akio Otsuka and Shinya Maruyama collaborated on?

They have worked on 1 movie together! Their first movie together was Kishiryu Sentai Ryusoulger VS Lupinranger VS Patranger (2020) and was their highest rated movie together. They have not worked together since Kishiryu Sentai Ryusoulger VS Lupinranger VS Patranger (2020).