Castle in the Sky

You may know this one as Tenkuu no Shiro Laputa; that's Castle in the Sky under its other release name. Studio Ghibli produced this movie. The run is complete — no gaps waiting on new episodes.

Genre-wise it's tagged Adventure, Fantasy, and Sci-Fi, which is the throughline if you're browsing by mood rather than by name. Liked it? The related picks below start with No Game, No Life, pulled from the same genre lane.