How many movies have Mikako Takahashi and Takayuki Hamana collaborated on?

They have worked on 4 movies together! Their first movie together was Sisters of Wellber – Elegy for a Sad Warrior (2007) while their highest rated movie together was Magical Girl Lyrical Nanoha: Reflection (2017). They have not worked together since Magical Girl Lyrical Nanoha: Reflection (2017). They are most known for their animation films together.