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Nichirin Swords ( (にち) (りん) (とう) Nichirin Tō?, lit. Sun Ring Blade) are special blades used by Demon Slayers made specifically for the purpose of slaying demons.

Description

Nichirin Swords (among other Nichirin bladed weapons) are the main weapons used by Demon Slayers in the Demon Slayer Corps in order to kill demons. They are forged with Scarlet Crimson Iron Sand ( (しょう) (じょう) () () (てつ) Shōjōhi Satetsu?) and Scarlet Ore ( (しょう) (じょう) () (こう) (せき) Shōjōhi Kōseki?), both of which are found on high mountains like the Sunlight Mountain, which is perpetually bathed in sunlight all throughout the year on Mount Yoko ( (よう) (こう) (やま) Yōkō yama?).[1]

As they constantly absorb sunlight, decapitating demons with Nichirin Swords can permanently kill them. Once their neck-bone is slashed by the weapon, their heads and bodies disintegrate into ash in a similar fashion to when exposed to sunlight. However, Nichirin Swords are less effective when used to slash other parts of a demon's body, making beheading the only viable option for Demon Slayers.

Nichirin Swords take on a distinct color when first drawn by its owner, which is why they are also referred to as "Color Changing Katanas".[2] However, the holder is required to have a certain amount of skill, or the blade will not change color.[3]

Demon Slayer recruits choose their own ore after successfully passing the Final Selection. The ore will then be used by a swordsmith of the Swordsmith Village during the forging process, and the swordsmith will personally bring the weapon to the Demon Slayer.

After the Demon Slayer reaches the rank of Hashira, their weapons will be engraved with the words "Destroyer of Demons" ( (あっ) () (めっ) (さつ) Akki Messatsu?). This tradition came from the creation of the sword that Tanjiro and Kotetsu found inside the Yoriichi Type Zero, which was created for the sole purpose of annihilating demons.[4]

List of Known Nichirin Weapons

Wielder Description of Nichirin Weapon Image
Tanjiro Kamado A standard sized and shaped Nichirin katana that is obsidian black in color. Tanjiro's Nichirin Sword.png
Tanjiro Kamado, Sakonji Urokodaki A standard sized and shaped Nichirin katana that is dull gray in color. Tanjiro's training sword.png
Zenitsu Agatsuma A standard sized and shaped Nichirin katana with a lightning streak along its blade. Zenitsu angry at Tanjiro.png
Inosuke Hashibira A pair of standard sized Nichirin katanas chipped with numerous gashes within the blade's edge that is indigo-gray in color with no handguard. Inosuke preparing to fight the demon.png
Kanao Tsuyuri A standard sized and shaped Nichirin katana that is light pink in color. Kanao prepares to decapitate Nezuko.png
Genya Shinazugawa A western double-barreled shotgun with Nichirin bullets.

A shorter and smaller Nichirin wakizashi that are dull gray in color.

Genya colored body.png
Giyu Tomioka A standard sized and shape Nichirin katana that is deep blue in color. Giyu's Nichirin Sword.png
Shinobu Kocho A sword with a thin blade and a needle-like tip that is lavender-blue in color. Shinobu introducing herself.png
Kyojuro Rengoku A standard sized and shaped Nichirin katana with a red flame pattern along its blade. Kyojuro's willingness to fulfill his duty.png
Tengen Uzui Two massive Nichirin cleavers connected by a chain that is amber in color. Tengen's Nichirin Swords.png
Muichiro Tokito A standard sized and shaped Nichirin katana that is white in color. Muichiro thanks Kozo CH119.png
Mitsuri Kanroji A long whip-like Nichirin sword that is pink in color. Mitsuri colored body.png
Obanai Iguro A serpent-like Nichirin katana that is lavender in color. Obanai colored body 2.png
Sanemi Shinazugawa A standard sized and shaped Nichirin katana that has a jagged jaw-like pattern that is green in color along its blade. Sanemi's Nichirin Sword.png
Gyomei Himejima A Nichirin spiked flail and battle axe connected by a long chain that is dull gray in color. Gyomei's Nichirin Weapon.png
Yoriichi Tsugikuni A standard sized and shaped Nichirin katana that is usually obsidian black in color, but bright red when in battle. Yoriichi colored body 2.png

Handguards

Each Nichirin Sword contains a handguard, or tsuba, that protects the swordsman from cutting themselves when they have a loose grip. It is located where the handle and the blade meet and can come in a variety of colors and shapes. Based on his appearances in the series, Inosuke Hashibira's Nichirin Swords temporarily had handguards when Kozo Kanamori first presented his newly-forged swords. Afterwards, he made his swords jagged-edged, removed the handguards, and wrapped the hilt with bandages.

Swordsman Description of Handguard Picture
Tanjiro Kamado* A black ring connected to its core by lines with a border of the same color. It heavily resembles a wagon wheel in appearance. Tanjiro's Tsuba E17.png
Zenitsu Agatsuma Circular shaped with 4 slight indentations, the center has a silver tone with small triangles and has a golden border. Zenitsu's Tsuba Manga.png
Inosuke Hashibira* A black ring connected to its core by an arrangement of semicircles, possibly to resemble a fish. Inosuke's Former Handguard.png
Kanao Tsuyuri Circular shaped with a light pastel blue center and border, filled 3 red sakura flowers and a winding pattern that is light green in color. Kanao's Tsuba Manga.png
Genya Shinazugawa Two hollow ovals that overlap its core and are a dull shade of brown. Genya's Tsuba Manga.png
Giyu Tomioka Hexagonal shaped with a bronze core and with an overlapping fuschia border.

Tomioka's second blade obtained during the fight against Muzan has a handguard resembling a whirlpool.

Giyu's Tsuba E1.png
Shinobu Kocho Shaped like a butterfly: Each wing has an aqua colored core with an orange border. Shinobu's Tsuba EP20.png
Kyojuro Rengoku Shaped like a flame with a red core and an orange border. Kyojuro's Tsuba.png
Tengen Uzui Circular shaped with 4 slight indentations and gold in color, there's a maroon ring that connects to the center; it has an outer teal border. Tengen's Tsuba.png
Muichiro Tokito Rectangular shaped with hollowed rectangles at each corner. Muichiro's Tsuba Manga.png
Mitsuri Kanroji Shaped like a 4 leaf clover; The leaves are heart-shaped with a pink core and a golden border. Mitsuri's Tsuba Manga.png
Sanemi Shinazugawa Abstract shape with 8 points with an overlapping pattern; Each plate has a forest green core with a silver border. Sanemi's Tsuba E22.png
Obanai Iguro Gold circular shape engraved with two snakes connected by several plant-like patterns. Obanai's Tsuba Manga.png
Yoriichi Tsugikuni Circular shaped with 4 slight indentations, with a black center and a golden border. Yoriichi's Tsuba Manga.png
  • Tanjiro began using Kyojuro's handguard as of Chapter 129.
  • Inosuke removed the handguard shortly after receiving the reforged sword.

Weapon Colors

Kyojuro explaining the main Breathing Styles' associated colors.

Nichirin Swords change color depending upon the user, making each blade unique. They can be of many colors. Zenitsu Agatsuma's blade is unique in that its coloration does not form as a solid band but instead as a lightning motif down the length of the blade. The reason for this patterning is unknown; however, when giving Tanjiro Kamado his new sword, Hotaru Haganezuka remarked that the past wielder of the blade before its refinery must have been a very strong swordsman. Given this statement, it is implied that a stronger skill level can create patterns or slight changes in a Nichirin Sword's coloration.

Each color is said to impart certain properties to the blade. The properties of black Nichirin Swords are not well understood, causing them to be considered a bad omen that the Demon Slayer will not go far (due to dying before much can be learned about the blade).

Symbolism[5] Colors No. Known users
Sun Black 2 Tanjiro Kamado

Yoriichi Tsugikuni

Moon Light Purple 1 Michikatsu Tsugikuni
Water Blue 2 Giyu Tomioka

Sakonji Urokodaki

Flame Red 2 Shinjuro Rengoku

Kyojuro Rengoku

Thunder Yellow 2 Zenitsu Agatsuma

Kaigaku

Wind Green 2 Sanemi Shinazugawa

Masachika Kumeno

Stone Gray 1 Gyomei Himejima
Flower Light Pink 2 Kanao Tsuyuri

Kanae Kocho

Insect Lavender-Blue 1 Shinobu Kocho
Serpent Lavender 1 Obanai Iguro
Love Dark Pink 1 Mitsuri Kanroji
Sound Amber 1 Tengen Uzui
Beast Indigo-Gray 1 Inosuke Hashibira
Mist White 1 Muichiro Tokito

Bright Red Nichirin Swords

By raising the temperature of the blade, a Nichirin Sword will turn red. Bright Red Nichirin Swords hamper the regeneration of demons and in some cases even burn them on a cellular level, leaving wounds that are unable to heal. Throughout the series, there have been 3 ways bright red blades have been shown to be achieved. These ways include using Nezuko Kamado's Blood Demon Art, raising the temperature of the blade with a strong grip, and clashing two Nichirin Swords together (the two most previously stated only capable of being achieved when the Demon Slayer Mark is present).

Trivia

  • Their namesake contains the kanji for "sun" ( (にち) nichi?), "ring" ( (りん) rin?), which could translate to either "sun ring" or its most common meaning, "solar." In addition to the kanji for "sword/blade" ( (とう) ?), the full translation to the Nichirin Sword is "solar blade."
  • The ore used to forge the swords are likely based off of Hihi'irokane ( (ヒヒ) (イロ) (カネ) ?), which literally means (Brilliant Scarlet Metal), a legendary metal of Japanese myth that shines brightly in a manner that it resembles flames or the sun. The metal is considered to be similar to other mythical ores such as Orichalcum of Greek and Roman myth, and as such is said to have had magical properties.
    • "Iron sand/black sand" ( () (てつ) Satetsu?) specifically higher quality "iron sand" ( () () () (てつ) Masa Satetsu?) is in fact known in real life to heat up when exposed to direct sunlight, capable of causing minor first degree burns if in contact without proper equipment.
  • Of the nine Hashira, only four of them use standard Nichirin Swords: Kyojuro Rengoku, Giyu Tomioka, Sanemi Shinazugawa and Muichiro Tokito.

References

  1. Kimetsu no Yaiba Manga: Chapter 9 (Page 12).
  2. Kimetsu no Yaiba Manga: Chapter 9 (Page 15).
  3. Kimetsu no Yaiba Manga and Anime: Chapter 69 (Page 7) and Episode 34.
  4. Kimetsu no Yaiba Manga: Chapter 117 (Page 11).
  5. Kimetsu no Yaiba Manga: Chapter 54 (Page 8).
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