Demon Slayer: Kimetsu no Yaiba - Season 5 Episode 6 The Strongest of the Demon Slayer Corps
Overview: Tanjiro and Zenitsu head to Himejima's training site deep in the mountains and reunite with Inosuke and Murata. Tanjiro first starts the training by being hit by a waterfall but struggles with the coldness and weight of the water.