How many movies have Erina Kojima and Risako Yoshida collaborated on?

They have worked on 3 movies together! Their first movie together was Chocolate Underground the Movie (2009) while their highest rated movie together was Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They have not worked together since Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They are most known for their animation films together.