How many movies have Naoko Ohtani and Ryuichi Inomata collaborated on?

They have worked on 1 movie together! Their first movie together was 天国のダイスケへ〜箱根駅伝が結んだ絆〜 (2003) and was their highest rated movie together. They have not worked together since 天国のダイスケへ〜箱根駅伝が結んだ絆〜 (2003).