How many movies have Katsuyuki Sumisawa and Nana Harada collaborated on?

They have worked on 3 movies together! Their first movie together was Mobile Suit Gundam: The Origin II - Artesia's Sorrow (2015) while their highest rated movie together was Mobile Suit Gundam: The Origin IV – Eve of Destiny (2016). They have not worked together since Mobile Suit Gundam: The Origin VI – Rise of the Red Comet (2018). They are most known for their animation films together.