Dororo to Hyakkimaru EP25 - The Demon Tsuchibouzu

Dororo and Hyakkimaru enter a city where a beggar named Gutaro has reportedly been sitting in the same place for ten years. He claims it is not out of laziness, but that he is keeping a monster underground. Hyakkimaru detects a demon, but Dororo stops him from killing Gutaro and promises to find a way to make the beggar move. After trying everything, Dororo drugs Gutaro and out of pity, washes his body, but this washes away a sutra written on his buttocks releasing the demon Tsuchibozu. Hyakkimaru then uses Gutaro as bait to attract the demon, which he eventually traps and kills. As the demon dies, Hyakkimaru recovers his skin.