The Little Chestnut / The Day the Kappa Came / The Oryuu Willow

A massive pumpkin grows from a tiny vine, and a man is very happy. Parents hear from the mountain god and water god that their child will be stolen by Kappas on his twelfth birthday. A huge willow stands in front of a tea shop. The son of the shop saves it from being cut down. Source: crunchyroll