Kimetsu no Yaiba: Hashira Geiko-hen Episode 6 English Subbed Episode Title: The Strongest of the Demon Slayer Corps Episode Description: At Gyomei's stage, strengthening the lower body, trainees must stand beneath a waterfall, lift three heavy logs, and push a boulder one chō to finish. Tanjiro and Zenitsu join Inosuke and fellow friend Murata. Despite completing the first two tasks, Tanjiro struggles to move the boulder. Due to the stage's difficulty, trainees choose to leave and place their hopes in Tanjiro instead. Genya reveals that moving the boulder requires Repetitive Action; a technique that involves focusing on certain memories to heighten concentration and increase strength. Tanjiro focuses on his family's memory and Kyojuro's message, manifesting his mark and allowing him to move the boulder. Elsewhere, the Biwa Demon Nakime has located 60% of the Demon Slayers on Muzan's orders, who desires to find Nezuko and Kagaya.