How many movies have Keiichiro Kawaguchi and Showtaro Morikubo collaborated on?

They have worked on 2 movies together! Their first movie together was The Prince of Tennis: Best Games!! Inui & Kaido vs Shishido & Otori / Oishi & Kikumaru vs Niou & Yagyu (2019) and was their highest rated movie together. They have not worked together since The New Prince of Tennis BEST GAMES!! Fuji vs Kirihara (2019).