How many movies have Satoshi Harayama and Takashi Hashimoto collaborated on?

They have worked on 3 movies together! Their first movie together was KanColle Movie (2016) while their highest rated movie together was Made in Abyss: Dawn of the Deep Soul (2020). They have not worked together since Made in Abyss: Dawn of the Deep Soul (2020). They are most known for their animation films together.