How many movies have Houko Kuwashima and Yoshinobu Nishizaki collaborated on?

They have worked on 7 movies together! Their first movie together was Space Battleship Yamato 2199 (2012) while their highest rated movie together was Space Battleship Yamato 2199: A Voyage to Remember (2014). They have not worked together since Space Battleship Yamato 2205: The New Voyage - Prior Chapter: Take Off (2021). They are most known for their animation films together.