How many movies have Ikko Tanaka and Koshi Inaba collaborated on?

They have worked on 4 movies together! Their first movie together was B'z SHOWCASE 2020 -5 ERAS 8820- Day4 (2021) and was their highest rated movie together. They have not worked together since B'z SHOWCASE 2020 -5 ERAS 8820- Day1 (2021). They are most known for their music films together.