How many movies have Junichi Hayama and Ryunosuke Otonashi collaborated on?

They have worked on 2 movies together! Their first movie together was Gunsmith Cats (1995) while their highest rated movie together was Pokémon: Arceus and the Jewel of Life (2009). They have not worked together since Pokémon: Arceus and the Jewel of Life (2009).