Folktales from Japan S01 E144 Wakahime of Ryuuguu / The Salt Millstone / The Escaped Sparrow

A young man throws all his firewood into a whirlpool, and the next day he's visited by a woman from the undersea palace of Ryuuguu. A millet makes salt, and never stops. Magical birds escape from a painting drawn by a master. Source: crunchyroll