Demon Slayer Chapter 66

Rengoku knows that his wounds are too severe to survive, but he uses his remaining strength to speak with Tanjiro. He tells him to visit the Rengoku family home, where old records kept by his father may contain information about the Hinokami Kagura. He also asks Tanjiro to pass his final words to Senjuro and his father. Before his strength fades, Rengoku makes it clear that he accepts Nezuko and believes she should be treated as a member of the Demon Slayer Corps.

In Demon Slayer Chapter 66, Rengoku encourages Tanjiro, Zenitsu and Inosuke to keep moving forward and become stronger even when they feel weak or overwhelmed. He reminds them to live with their heads held high and carry their hearts forward. Rengoku then sees the spirit of his mother, who tells him that he has done well. He smiles peacefully before passing away. Later, the news of his death reaches Kagaya Ubuyashiki and the other Hashira, leaving the entire Demon Slayer Corps mourning the loss of the Flame Hashira.