Seen everything by Ko Matsuo?
If you've already watched everything Ko Matsuo directed, here are 12 films from other directors that share the orbit of Mobile Suit Gundam Thunderbolt: December Sky — the catalog's mood-cluster and similarity-graph neighbours, filtered to exclude Ko Matsuo's own filmography. Where to go next. (Also: Ko Matsuo's full filmography · where to start with Ko Matsuo.)
Mobile Suit Gundam: The Origin VI – Rise of the Red Comet
Mobile Suit Gundam: The Origin V: Clash at Loum
Mobile Suit Gundam: The Origin II - Artesia's Sorrow
Mobile Suit Gundam: The Origin III - Dawn of Rebellion
Mobile Suit Gundam: The Origin IV – Eve of Destiny
Initial D Legend 2: Racer
Ghost in the Shell: Arise - Border 1: Ghost Pain
Mobile Suit Gundam: The Origin I - Blue-Eyed Casval
Space Battleship Yamato 2199: Odyssey of the Celestial Ark
Orange: Future
Kabaneri of the Iron Fortress: Life That Burns