How many movies have Houko Kuwashima and Shigeru Chiba acted in together?

They have worked on 8 movies together! Their first movie together was Sergeant Keroro The Super Duper Movie 5: Creation! Ultimate Keroro, Wonder Space-Time Island (2010) while their highest rated movie together was Armored Trooper VOTOMS: Alone Again (2011). They have not worked together since Space Battleship Yamato 2199: And Now the Warship Comes (2013). They are most known for their animation films together.