How many movies have Hiroshi Ohnogi and Ichiko Hashimoto collaborated on?

They have worked on 2 movies together! Their first movie together was RahXephon: Pluralitas Concentio (2003) while their highest rated movie together was Code Geass: Akito the Exiled 1: The Wyvern Arrives (2012). They have not worked together since Code Geass: Akito the Exiled 1: The Wyvern Arrives (2012).