How many movies have Hiro Shimono and Noriko Izumo collaborated on?

They have worked on 4 movies together! Their first movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 1 - One Year After the Battle (2017) while their highest rated movie together was Donten: Laughing Under the Clouds - Gaiden: Chapter 3 - Conspiracy of the Military (2018). They have not worked together since ACCA: 13-Territory Inspection Dept. - Regards (2020). They are most known for their animation films together.