 If you liked Mononoke Hime |  ...then you might like Ged Senki |
Gedo Senki, meet your older, smarter sibling, Mononoke Hime. Gedo Seki may be based on the Earthsea novels, but Mononoke is considerably deeper, and every bit as visually and aurally impressive. To the inverse, if you've seen only Mononoke, Gedo Senki is worth watching for those visuals, and because it's Earthsea.