Webyoriichi was a member of the demon slayer corps. He wore hanafuda earrings like tanjiro and is revered as the first breath user. He was the creator of the. Webyoriichi tsugikuni and tanjiro kamado are not blood relatives, but they are connected by friendship and fate. Webpossessing unrivaled strength and combat abilities, yoriichi was said to be 'chosen by god' and was certainly the strongest demon slayer in the series. Webyoriichi tsugikuni was a prodigy who invented breathing styles, starting with sun breathing. Breathing styles evolved into wind, water, fire, stone, and. Webthis technique emulates the scorching rays of the sun that blaze out, allowing the user to unleash a series of devastating attacks that can hardly be defended. Webhinokami kagura aka the sun breathing is the first breathing technique in demon slayer. It was developed by yoriichi tsugikuni, the first demon slayer to ever. Webyoriichi tsugikuni stands as one of the most legendary and influential figures in the entire history of the demon slayer corps. As the creator of breath of the sun and. Webin demon slayer, the creation of the 13th form of sun breathing by yoriichi tsugikuni is done to reveal his genius and strategic mind. Being a synthesis of all.