海ひこ山ひこ (1968)

The Sea Boy and the Mountain Boy

Yamahiko, the younger brother, hunts in the mountains, and Umihiko, the older brother, fishes in the sea. One day, Yamahiko loses Umihiko's precious fish hook. Yamahiko goes to a country at the bottom of the sea and somehow finds the hook. But when he returns, he finds his village in ruins.

Animation