Akki Messatsu: the Hashira inscription and the other kanji of Demon Slayer

Four characters engraved at the base of a blade, visible only in close-up. They serve no purpose in combat. They do not make the sword stronger or faster. And yet no demon slayer bears them by chance: they mean that he has reached the top of the Corps. In Demon Slayer, writing is everywhere, on blades, on backs, even in the demons’ eyes.

Here is what the Akki Messatsu inscription means, who bears it, and what the series’ other characters tell. Our page on Nichirin swords, colours, forging and meaning presents the weapon that bears it.

What does Akki Messatsu mean?

Akki Messatsu is written with four Japanese characters: 悪鬼滅殺. The first, 悪, means evil. The second, 鬼, the demon, the oni of Japanese legends, those horned ogres that have haunted folk tales for centuries. In the series, it refers to the creatures born of Muzan’s blood. The next two, 滅 and 殺, mean annihilate and kill. Put together, they form a phrase translated as “destroy evil demons”, or more literally “annihilate and kill the demons of evil”.

The phrase has the bluntness of a military motto. It speaks neither of honour nor of revenge, only of the mission. It is the very reason the Demon Slayer Corps exists, engraved in the steel of those who defend it best.

The word demon, 鬼, also appears in the series’ Japanese title and in the name of the Corps itself. Our page on the world of Demon Slayer at a glance presents the Corps and its era.

Why engrave a motto on a weapon?

Engraving on Japanese swords is an ancient tradition. Swordsmiths signed their blades on the tang, the part hidden in the handle, with their name, sometimes their province and the date. Some blades also received decorative or religious engravings, called horimono: dragons, protective deities, sacred characters or prayers.

These engravings had a moral function as much as an aesthetic one. They reminded the bearer what their weapon was meant to serve, and placed the fight under protection. A blade engraved with a warrior deity or a Buddhist invocation was not just a tool: it committed the person who carried it. Demon Slayer takes up this idea and simplifies it: a single phrase, the same for all the Hashira, which says why the weapon exists.

In the series, the inscription also serves as a mark of recognition. A demon slayer who sees these four characters on a blade knows they are facing one of the nine best fighters in the Corps, even before that person introduces themselves.

Where is the inscription engraved?

The inscription is engraved on the flat of the blade, just above the guard, running lengthwise. You see it when the demon slayer draws the sword, or in close-ups of the blade. It does not hinder combat in any way, since it sits on the part that is not used for cutting.

It is the village swordsmiths who engrave it, when a demon slayer becomes a Hashira. The blade Kyojuro Rengoku carries on the Mugen Train shows it clearly, as does Giyu Tomioka’s. The gesture marks a transition: the same weapon, in the same hands, but with one more rank. On our replicas, these characters are reproduced near the guard in the character’s colour: silver on Giyu’s blue blade, white on Rengoku’s, green on Muichiro’s light blade. Our article on the village swordsmiths tells of these craftsmen.

Our 104 cm Rengoku replica, with its flame guard and scabbard scattered with black patterns, bears four white characters near the guard, on a black blade with a red edge. It is filed in the complete Kyojuro Rengoku collection.

An engraving reserved for the Hashira

Only the Hashira bear this inscription. The Hashira are the nine best demon slayers in the Corps, those who have killed one of the Twelve Kizuki or slain fifty demons. They lead the most dangerous missions and answer directly to the head of the Corps, Kagaya Ubuyashiki.

Receiving the inscription therefore means receiving a responsibility as much as an honour. The Hashira know they will fight on the front line against the Upper Moons, and that many of them will not survive. Six of the nine Hashira of Tanjiro’s generation die before the end of the war. Our page on the Demon Slayer Hashira presents them one by one.

Tanjiro, for his part, never becomes a Hashira. His blade does not receive the four characters, and yet he carries Kyojuro Rengoku’s guard, which perhaps says more. Our article on the ranks of the Demon Slayer Corps details the hierarchy, from the lowest rank to the Hashira.

The rank engraved on the hand

The Hashira are not the only ones to bear writing invisible at first glance. Every demon slayer has their rank engraved on the back of their hand using a technique unique to the Corps. The character only appears when they clench their fist. It lets you check someone’s rank with a single gesture.

The ranks follow the ten characters of the traditional calendar, from the lowest, mizunoto, to the highest, kinoe. Tanjiro starts at the very bottom, like every recruit who comes out of the Final Selection. To become a Hashira, you must first reach the rank of kinoe, then kill one of the Twelve Kizuki or fifty demons. The inscription on the blade crowns this journey.

The sword hidden in Yoriichi Type Zero

In the Swordsmith Village, Tanjiro breaks a six-armed training puppet, built in the image of Yoriichi Tsugikuni. Inside, he discovers a rusty sword, forged several centuries ago. On its blade, a single character is engraved: 滅, annihilate.

This single character is a reminder that the tradition of inscriptions is an old one: already in Yoriichi’s time, demon slayers engraved their mission on the steel. Hotaru Haganezuka polishes this old blade for days on end, even when Gyokko attacks him, and it becomes Tanjiro’s new sword. The boy therefore fights with a character engraved in the time of Sun Breathing, and his new blade carries Kyojuro Rengoku’s guard. Two legacies meet in the same weapon. Our article on Yoriichi Type Zero tells of this puppet.

The 滅 character on the demon slayers’ backs

The character 滅 does not stay hidden on old blades. It is displayed large, white on black, on the back of every demon slayer’s uniform. Every soldier in the Corps, from the lowest rank to Hashira, wears this word between the shoulder blades: annihilate.

The uniform itself is a special item. Made from a special fibre, it resists the claws of the weakest demons and dries quickly in the rain. The Hashira often wear it under a personal haori, which sometimes hides the character: Giyu’s, cut from two fabrics, Shinobu’s, with butterfly wings. The Kakushi, the support unit, wear a separate uniform, their faces masked, with another character on the back, 隠, which means hidden. Our article on the Kakushi, the shadow unit presents these soldiers of the shadows.

For a cosplay, this character on the back makes all the difference: it is what makes a demon slayer recognisable from behind at a convention. Our sleeveless Tengen Uzui outfit bears it in large letters, and is in the complete Tengen Uzui collection.

Sanemi’s 殺 character

Sanemi Shinazugawa, the Wind Hashira, wears a white haori marked on the back with an enormous black character: 殺, kill. It is the last character of the Akki Messatsu inscription, displayed like a provocation. Sanemi has no nuance where demons are concerned, and he does not try to hide it.

This character takes on another meaning once you know his story. Sanemi killed his own mother, who had become a demon, to protect his brothers and sisters, and his little brother Genya called him a murderer. The word kill he wears on his back is also the one that broke his family. Throughout his life as a Hashira, he pushes Genya away with feigned harshness, to force him to leave the Corps and live far from demons. Our portrait of Sanemi Shinazugawa, the Wind Hashira tells of that night.

Our Sanemi outfit features this white haori with a large black ideogram on the back, over the V-neck open uniform. It is filed in the complete Sanemi Shinazugawa collection.

Gyomei and his prayer

Gyomei Himejima, the Stone Hashira, wears a haori covered in characters. They are not threats but a Buddhist prayer, Namu Amida Butsu, the invocation to the Buddha Amida, repeated over the entire surface of the fabric. Gyomei prays constantly, tells his prayer beads and weeps over the fate of those he meets, demons included. His tears flow even during the Hashira meeting, when he judges Tanjiro.

This contrast says everything about the character. The strongest of the Hashira, able to crush a demon with his flail, is also a monk who took in orphans at his temple. His haori does not celebrate death, it asks for peace for the dead. Our portrait of Gyomei Himejima, the Stone Hashira tells this story.

Our Gyomei outfit features this green haori covered in characters, with a purple sash and a string of large red prayer beads. It is filed in the complete Gyomei Himejima collection.

Kimetsu no Yaiba, the title

The series’ original title, Kimetsu no Yaiba, is written 鬼滅の刃. In it we find demon, 鬼, and annihilate, 滅, followed by blade, 刃. The title therefore means roughly “the blade that annihilates demons”. The international title, Demon Slayer, puts the emphasis on the fighter rather than the weapon.

In France, the first volumes first came out in 2017 under the title Les Rôdeurs de la nuit, before the series was relaunched in 2019 under the name Demon Slayer, in line with the anime. The Japanese title, for its part, has never changed: its four signs say the same thing as the Hashira inscription, only shorter.

The Corps itself is called Kisatsutai, 鬼殺隊, “the corps that kills demons”. The same characters come up everywhere, on the blades, the uniforms, the haori and even in the name of the work. Our article on Koyoharu Gotouge, the author of Demon Slayer presents the woman who imagined this world.

The characters in the Moons’ eyes

Demons have their own writing too, and it is engraved in their flesh. The Twelve Kizuki bear their rank in their eyes: Upper or Lower Moon, followed by a number. Daki and Gyutaro bear the six of the Upper Moons, Kokushibo the one. On Kokushibo, the characters appear in each of his six eyes, as if his rank were all over his face. Muzan can erase this rank with a gesture, as he did with Kyogai by slashing his eye.

The parallel is striking. Demon slayers engrave their mission on steel; demons bear their rank in the body Muzan has given them. The former choose their words, the latter have them imposed. And when a demon loses his place, it is in his flesh that his rank is struck out, not on a blade put away at the bottom of a chest. Our article on the Twelve Kizuki details this system.