How many movies have Katsutoshi Tsunoda and Masahiro Sekino collaborated on?

They have worked on 5 movies together! Their first movie together was Mobile Suit Gundam F91 (1991) while their highest rated movie together was Mobile Suit Gundam 0083: Afterglow of Zeon (1992). They have not worked together since Mobile Suit Zeta Gundam - A New Translation II: Lovers (2005). They are most known for their animation films together.