How many movies have Noriko Hidaka and Shinichi Igarashi collaborated on?

They have worked on 2 movies together! Their first movie together was Rurouni Kenshin: New Kyoto Arc: Cage of Flames (2011) while their highest rated movie together was Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012). They have not worked together since Rurouni Kenshin: New Kyoto Arc: The Chirps of Light (2012).