How many movies have Hirofumi Masuda and Keiji Ishihara collaborated on?

They have worked on 4 movies together! Their first movie together was Slayers Gorgeous (1998) while their highest rated movie together was Detective Conan: Captured in Her Eyes (2000). They have not worked together since Magical Sisters Yoyo & Nene (2013). They are most known for their animation films together.