What does Kimetsu no Yaiba mean?

Many fans simply say “Demon Slayer”, others “Kimetsu”, and some wonder why the series has two titles. The Japanese title, Kimetsu no Yaiba, is not a mere translation of the English: it is the original title, chosen by the author, and it says something the international title does not. It deserves to be broken down character by character.

Here is what Kimetsu no Yaiba means, where each of its characters comes from, why the word kimetsu is an invention, and how the title was adapted outside Japan. Our page on the universe of the series presents the world of the series, and our article on Koyoharu Gotouge, the author of the series tells about the person who chose this title.

The three characters of the title

The title is written 鬼滅の刃 and read ki-metsu no yaiba. It is made up of three Chinese characters, the kanji, and a small sign from the Japanese alphabet, の, which is read no and links the words together, a bit like “of” in English. Each character carries its own meaning, and it is their combination that gives the title.

The first, 鬼, is read ki or oni and refers to demons, the ogres of Japanese folklore. It is a very old character, which appears in hundreds of Japanese words linked to monsters, fear or superhuman strength. The second, 滅, is read metsu and means to annihilate, destroy, make disappear. The third, 刃, is read yaiba and refers to the blade of a sword, the part that cuts. Put end to end, this gives “the blade of the annihilation of demons”, more simply translated as “the blade that annihilates demons”.

The title therefore describes both the object and the mission, in only four signs, which makes it easy to remember and to write. The object is the Nichirin sword, the only blade capable of killing a demon by cutting its neck. The mission is the annihilation of demons, pursued by the whole Corps. Our page on Nichirin swords, their colours and their meaning presents this blade.

Kimetsu, an invented word

The word kimetsu, 鬼滅, did not exist in the Japanese language before the series. Koyoharu Gotouge made it by joining the character for demon to that of annihilation. A Japanese reader immediately understands what it means, but had never seen it written that way. This is what makes the title so recognisable: it looks like no other.

In Japan, this invented word has become the everyday name of the series. Everyone simply says “Kimetsu”, as people say “Demon Slayer” in France, and the word found its way into conversations, newspapers and advertisements during the phenomenon that followed the release of the anime and then of the Mugen Train film. Our article on the series’ box office records tells of the scale of this success.

The Demon Slayer Corps, for its part, bears a name built on the same model: 鬼殺隊, kisatsutai, literally “the corps that kills demons”. The character 殺 replaces 滅 there. The two words say almost the same thing, but the series title chose annihilation rather than simple killing, a nuance that announces a fight until the complete disappearance of demons. Our article on the Demon Slayer Corps tells about this secret organisation.

The invented word has had offspring. The humorous spin-off series that transposes the characters into a present-day high school is called Kimetsu Gakuen, the Kimetsu school, and Japanese fans have coined dozens of expressions from this word, to talk about themed cafés, exhibitions or products linked to the series. For a word that did not exist in 2015, that is quite a career. Our article on the spin-offs and novels presents these spin-off series.

The 滅 character on the demon slayers’ backs

The middle character of the title can be seen everywhere in the series. It is embroidered large on the back of every demon slayer’s black uniform, between the shoulder blades. When Tanjiro turns around, it is what you see. The kanji thus becomes the emblem of the Corps, the equivalent of a coat of arms, worn by hundreds of fighters whose existence the State ignores.

Fans have adopted it in turn. The character 滅 has become one of the most worn motifs on clothing inspired by the series: a single character, drawn with a brush, can be recognised from afar and gives a Japanese look without showing a face. Our black hoodie bears precisely this single large white character on the back, the series logo on the chest, and the title in Japanese syllables on the sleeves, in the shop’s sweatshirt collection.

Akki Messatsu, the inscription of the Hashira

The same character reappears on the swords of the Hashira. Their blades bear the engraved inscription 悪鬼滅殺, akki messatsu, which means “annihilate and kill evil demons”. In it you find 鬼, the demon of the title, 滅, annihilation, and 殺, killing, preceded by 悪, evil. It is the motto of the strongest fighters in the Corps, engraved on the weapon that sets them apart from ordinary demon slayers.

This inscription links the series title to its most famous heroes: every time a Hashira draws their sword, they carry on their blade the very meaning of the word kimetsu. Our article on the Akki Messatsu inscription details its characters, and our page on the nine Hashira presents their blades.

Other characters wear characters on their clothes. Sanemi, the Wind Hashira, displays on his back the character 殺, killing. Gyomei, the Stone Hashira, wears a haori covered with a Buddhist prayer. Each of these inscriptions says something about the character: Sanemi’s rage, Gyomei’s faith. Our compression shirt bears in the centre of the chest the character for destruction in a brush-drawn circle, in the sports t-shirt collection.

The blade, the last character

The last character of the title, 刃, is worth pausing on. The blade it speaks of is not just any sword: it is the Nichirin blade, forged from an ore that absorbs sunlight, the only metal capable of killing a demon. The swordsmiths who make it live in a hidden village, wear hyottoko masks and devote their lives to this art.

Each blade changes colour the first time its bearer draws it: blue for Water, red for Flame, yellow for Thunder, black for Tanjiro. It thus becomes a portrait of the one who holds it. By placing the blade at the centre, the title reminds us that everything rests on this object: without it, no amount of courage is enough. Our article on the colours of Nichirin swords details what each blade reveals, and the shop’s katana collection gathers replicas of the characters’ blades.

The blade is also a common thread in the story. Tanjiro breaks or loses his swords so often that his swordsmith, Hotaru Haganezuka, chases him screaming every time. In the Swordsmith Village, a three-century-old training puppet hides an ancient blade, which Tanjiro receives for the final battle. The title therefore announces a story of blades as much as a story of demons.

Demon Slayer, the international title

Outside Japan, the series is known under the title Demon Slayer, chosen for the English edition. It means “the slayer of demons” and puts the emphasis on the hero, Tanjiro, rather than on the blade. The full title, on most editions, combines both: Demon Slayer, Kimetsu no Yaiba. Fans who know the Japanese version use one or the other interchangeably, and many French speakers simply say “Kimetsu” among themselves, like the Japanese.

In France, the manga is published under the international title, Demon Slayer, and the anime follows the same usage. You also hear the word pourfendeur, which translates the name of the Corps in the French version. The verb pourfendre, very old, means to split from top to bottom with a stroke of the sword: a word from chivalric romances, well chosen for fighters who kill demons with a single blow to the neck. Our article on the French editions of the manga presents the different editions of the manga, and the one on the French dub and the subtitled version compares the two versions of the anime.

The anime’s subtitles

The anime adds to the main title a subtitle for each season, taken from the name of the adapted arc. After the first season come the Mugen Train, the Entertainment District, the Swordsmith Village and the Hashira Training, then the Infinity Castle, adapted for the cinema. In Japanese, each of these subtitles ends with a word meaning “chapter” or “arc”, as in a novel divided into parts.

This division helps you find your way: people speak of the Entertainment District season rather than season 2, and the name of the arc immediately tells you what it is about. Our article on the number of seasons of the anime presents each season and each film in order.

The title in the history of the manga

The manga was published every week in Weekly Shonen Jump magazine, from 15 February 2016 to 18 May 2020, for a total of 205 chapters collected in 23 volumes. The title never changed during those four years. It became one of the best known in the magazine, to the point that the single character 滅 is now enough to evoke the series for millions of readers. The bound volumes display the title in large letters on each cover, above the characters featured in the volume, so that a complete shelf forms a gallery of the whole cast.

The title logo also has its own personality: the characters are drawn as if with a brush, on a red circle background, which recalls both Japanese seals and the sun, so important in the story. Our article on the number of volumes of the manga details how the manga is divided, and the one on the Japanese vocabulary of the series explains the other words you come across.

Writing and pronouncing Kimetsu no Yaiba

To pronounce the title the Japanese way, each syllable is said clearly: ki-meh-tsu no ya-i-ba, with no marked stress. The “tsu” is pronounced as in the word tsunami, and the “ai” of yaiba is said as two distinct sounds. The title is sometimes written as a single word, Kimetsunoyaiba, or shortened to Kimetsu: these are fan usages, the most common spelling remains Kimetsu no Yaiba, in three words.

For a fan who wants to wear the title, the choice is between the full logo, with its red circle, the single character 滅, more discreet, or the name of their favourite character in kanji. The single character will appeal to those who like understated motifs, the logo to those who want the series to be recognised at first glance. In winter, the knitted beanie with the logo and the character is easy to wear, and the beanie collection offers several models. Our article on the meaning of the characters’ names presents the other characters you can wear.