Haori | Demon Slayer: Kimetsu no Yaiba | Rengoku Kyojuro

Kyojuro wore the standard black Demon Slayer uniform,.. Over this, he wore a haori with a white-yellow gradient pattern and red flame-like ridges at the end that his father Shinjuro had once worn and more than likely his father had worn when they were the Flame Hashira respectively. 

Demon Slayer: Kimetsu no Yaiba 
In Taisho-era Japan, Tanjiro Kamado is a kindhearted boy who makes a living selling charcoal. However, his peaceful life is shattered when a Demon slaughters his entire family. His little sister Nezuko is the only survivor, but she has been transformed into a Demon herself! Tanjiro sets out on a dangerous journey to find a way to return his sister to normal and destroy the Demon who ruined his life.

ZeKyojuro Rengoku is a major supporting character of Demon Slayer: Kimetsu no Yaiba and a major character in the Mugen Train Arc. He is of the highest rank in the Demon Slayer Corps, where he is the Flame Hashira. 

(from Kimetsu no Yaiba Wiki)