How many movies have Hideki Ishii and Ryotaro Okiayu collaborated on?

They have worked on 1 movie together! Their first movie together was Pointy-Headed Gonta: The Story of the Two-Named Dog in the Fukushima Disaster (2022) and was their highest rated movie together. They have not worked together since Pointy-Headed Gonta: The Story of the Two-Named Dog in the Fukushima Disaster (2022).