Seen everything by Hideki Oka?
If you've already watched everything Hideki Oka directed, here are 12 films from other directors that share the orbit of Ultraman Saga — the catalog's mood-cluster and similarity-graph neighbours, filtered to exclude Hideki Oka's own filmography. Where to go next. (Also: Hideki Oka's full filmography · where to start with Hideki Oka.)
Ultraman Tiga & Ultraman Dyna: Warriors of the Star of Light
Ultraman Zero: The Revenge of Belial
Ultraman Zearth
Mobile Suit Gundam 00 Special Edition III: Return The World
Pokémon: Mewtwo - Prologue to Awakening
Neppuu Kairiku Bushi Road
Kamen Rider Zi-O the Movie: Over Quartzer
Ultraman X The Movie: Here He Comes! Our Ultraman
Ultraman Tiga & Ultraman Dyna & Ultraman Gaia: The Battle in Hyperspace
Mazinkaizer SKL
Ghost in the Shell: Arise - Border 3: Ghost Tears
Ghost in the Shell: Arise - Border 4: Ghost Stands Alone