Why Nichirin blades change colour in Demon Slayer, what each Breathing style's colour looks like, and what Tanjiro's black blade means.
In this story · この物語の品
In Demon Slayer, every swordsman of the Demon Slayer Corps carries a Nichirin blade, forged from ore that absorbs sunlight. The first time a new owner draws it, the blade changes colour to match that person, and the colour tends to follow the Breathing style they are suited to. Here is what the most famous colours mean.
Tanjiro: black
Tanjiro Kamado's blade turned jet black the moment he drew it. Black Nichirin blades are rare, and in the story little is known about which Breathing they suit, which is part of their mystery; Tanjiro's later links him to Sun Breathing through his family's Hinokami Kagura. See Tanjiro's black Nichirin katana, or read the story of Tanjiro's sword.
Zenitsu: yellow lightning
Zenitsu Agatsuma's blade carries a lightning pattern that matches his Thunder Breathing. He mastered only its First Form, Thunderclap and Flash, and later created a Seventh Form of his own. See the Zenitsu katana and the Zenitsu LED katana in white or yellow.
Rengoku: flame
The Flame Hashira's blade is red-orange, and his sword is known everywhere by its flame-shaped guard, which later passes to Tanjiro. See the Rengoku katana.
Giyu: water blue
Giyu Tomioka, the Water Hashira, carries a blue blade for Water Breathing, the style he used to create its Eleventh Form, Dead Calm. See the new Giyu wooden katana and the Giyu LED katana.
Sanemi: wind green
Sanemi Shinazugawa's Wind Hashira blade is green, matching Wind Breathing. See the Sanemi katana.
Inosuke: jagged blades
Inosuke Hashibira's two Nichirin blades are famous less for their colour than their shape: he chips them into jagged, saw-like edges himself for his Beast Breathing. See the Inosuke katana.
The twins: Yoriichi and Kokushibo
Yoriichi Tsugikuni, the first user of Sun Breathing, carried a black blade. His twin brother became Kokushibo, Upper Moon One, whose sword Kyokokukamusari is grown from his own flesh with eyes along the blade. See the Yoriichi and Kokushibo katanas, and Kokushibo's sword explained.
Other Hashira
Not every Hashira fights with a standard blade: Mitsuri Kanroji's sword is thin and whip-like, Obanai Iguro's is wavy like a snake, Tengen Uzui uses two cleaver-like blades, and Gyomei Himejima fights with a flail and an axe.
Where to see these blades next
The first Infinity Castle film (2025) became the highest-grossing anime film ever worldwide. Part 2 of the Infinity Castle trilogy is not coming in 2026; reports point to 2027, and fans expect the next big news at the Demon Slayer stage at Jump Festa in December. Read what we know about Infinity Castle Part 2.
Bring a Nichirin blade home
Every Demon Slayer sword we make is in our Demon Slayer collection: 104 cm wooden and LED katanas, decorative and non-sharp.
Delivery, COD and gift wrap
Every katana ships across India, usually arriving in 2–7 days after dispatch (within about 48 hours). Pay online, or choose partial COD: a small advance online and the rest in cash on delivery. Gift wrap is available at checkout. If a katana arrives damaged, report it within 3 days with an unboxing video and we replace it free.
All our katanas are fan-made, decorative replicas, not official or licensed products.
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