The Deer Springs / Tail Fishing / Hachiroutarou

A woodcutter meets a wounded deer in the mountains. He saves it from a hunter and watches until its wounds are healed... The Fox comes to see the river otter, who is good at catching fish. He takes fish from the river otter but never gives any himself. And so the River Otter comes up with an idea... A young man in the village of Matagi, Hachirou Tarou, goes to the mountains with two of his friends, but as he gets ready for dinner he gives into his hunger and eats their fish. Source: crunchyroll