Flame Breathing ( (ほのお) () (きゅう) Honō no kokyū?) is one of the five main Breathing Styles directly derived from Sun Breathing. The Breathing Style of the Flame Breathing seemed to have been developed by a distant ancestor of the Rengoku Family, who was originally a student of Yoriichi Tsugikuni. It can be assumed that this student attempted to master the Sun Breathing but, due to him not being as innately powerful as Yoriichi, his teacher altered his Breathing Style training in order to better focus on his students individual strengths and weaknesses. Eventually, his student continued to develop and train this style until it became its own unique breathing and was subsequently named the Flame Breathing. Since then, this particular Breathing Style has been passed down and taught through generations of his descendants and the future members of the Demon Slayer Corps.[1]

Breathing Style Relationship Chart



  1. First Form: Unknowing Fire ( (いち) (かた) 不知火 (しらぬい) Ichi no kata: Shiranui?)[2] - The swordsman charges towards their opponent at high speed and decapitates them in one or multiple slashes.
  2. Second Form: Rising Scorching Sun ( () (かた) (のぼ) (えん) (てん) Ni no kata: Nobori en ten?)[3] - The swordsman uses an upwards moving slash attack.
  3. Third Form: Fiery Spirits ( (さん) (かた) () (えん) (ばん) (じょう) San no kata: Kien Banjō?)[4] - The swordsman swings their blade downwards in an arc.
  4. Fourth Form: Blooming Flame Undulation ( () (かた) (せい) (えん) のうねり Shi no kata: Sei en no uneri?)[5] - The swordsman spins their sword in a circular motion, deflecting the enemies' attacks.
  5. Fifth Form: Flame Tiger ( () (かた) (えん) () Go no kata: Enko?)[6] - A series of sword slashes that take on the form of a tiger.
  • Ninth Form: Rengoku ( () (かた) (れん) (ごく) Ku no kata: Rengoku?)[7] - A devastating dashing slash initiated from a high stance. The technique carves a deep impression in the ground.  


Shinjuro Rengoku
Kyojuro Rengoku
Shinjuro Rengoku Kyojuro Rengoku


— Flame Breathing —


  1. Kimetsu no Yaiba Manga: Chapter 178 (Page 7).
  2. Kimetsu no Yaiba Manga: Chapter 54 (Page 15).
  3. Kimetsu no Yaiba Manga: Chapter 63 (Page 5).
  4. Kimetsu no Yaiba Movie: Mugen Train.
  5. Kimetsu no Yaiba Manga: Chapter 63 (Page 17).
  6. Kimetsu no Yaiba Manga: Chapter 63 (Page 21).
  7. Kimetsu no Yaiba Manga: Chapter 64 (Pages 8-9).

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