The Raccoon's Spinning Wheel / The Two Moons / Ubasute Mountain (S01E138)

A raccoon comes to a woodcutter's house and learns to work a spinning wheel. On a moonlit night, a giant snake appears with two moons in tow and swallows a hunter. His daughters find out and swear revenge. A lord issues an order that anybody who turns 60 must be left in the mountains to die. A son tearfully takes his mom up to the mountains but can't bear to it. He hides her beneath the floor. (Crunchyroll)