How many movies have Shingo Ishikawa and Takehiro Hamatsu collaborated on?

They have worked on 4 movies together! Their first movie together was Galaxy Express 999: Eternal Fantasy (1998) while their highest rated movie together was Detective Conan: Private Eye in the Distant Sea (2013). They have not worked together since Detective Conan: Private Eye in the Distant Sea (2013). They are most known for their animation films together.