Webinstantly, yoriichi's ability, the power to see the transparent world with his heightened perception, enables him to see through muzan and discover that the. Webthe sun breathing technique is more commonly known as the breath of the sun and is the core concept behind yoriichi's power. It is the most powerful and versatile form of combat in the demon. Webyoriichi was the very first user of the breathing styles and he came up with sun breathing, a powerful breathing form that is known to be the most effective against. Webthe strength of a breath style is determined by the user themselves. The only reason why the breath of the sun is seen as this godly breath style is because of the man behind it,. Yoriichi’s signature breathing style, considered the most powerful of all. It allowed him to channel and manipulate the power of the sun itself,. Webdespite his prodigious abilities, yoriichi still trained rigorously to hone his skills. He developed an entirely new breath style derived from his observation of the. Webyoriichi tsugikuni is an exceptionally intriguing character and is known as the strongest demon slayer in the history of the corps. And he definitely deserves an. Webyoriichi tsugikuni, the first demon slayer, is the founder and also the first user of sun breathing. But as per demon slayer’s timeline, tajiro kamado is the only.