Demon Slayer Manga Chapter 170

Sixty years later, the past comes walking up a mountain road. An elderly Yoriichi, long exiled from the Corps, confronts the brother who became a demon. Despite his age, his first strike nearly ends Kokushibo, proving the gap between them never closed at all.

Before the second strike falls, Yoriichi dies standing, his life simply finished. Kokushibo cuts the body down in frustration and finds a small cloth flute he once gave his brother, kept safe for sixty years. Demon Slayer Chapter 170 shows a demon weeping over the one treasure he could not throw away.