S1·E103 Gonpachi and Tsubaki / The Thousand League Sandals / Mother and Child Hill

Gonpachi was working hard at a gold mine to raise money for his family. Three brothers get lost in the mountains and find themselves at the house of a terrifying mountain grannie. A traveler comes to an inn on the Sumidagawa river. She's looking for her son who vanishes. Source: crunchyroll