Who Is Yoriichi Tsugikuni & Is He the Strongest Demon Slayer?

Who Is Yoriichi Tsugikuni and Is He the Strongest Demon Slayer?

One of the characters in the Demon Slayer manga a little is known about is Yoriichi Tsugikuni. So who is Yoriichi Tsugikuni and is he the strongest Demon Slayer to have ever existed or not?

Yoriichi Tsugikuni is a major supporting character in Demon Slayer: Kimetsu no Yaiba. He was a legendary Demon Slayer of the Demon Slayer Corps during the Sengoku Era. Yoriichi is the younger twin brother of Michikatsu Tsugikuni, who later became a demon and joined the Twelve Demonic Moons, serving as Upper First Moon.

The rest of this article is going to provide further information on Yoriichi Tsugikuni. We are going to answer some questions and we are going to fully introduce the character so that you don’t have any dilemmas regarding Yoriichi and his role in Demon Slayer, especially related to his powers and abilities.

Who Is Yoriichi Tsugikuni?

Yoriichi and his twin brother, Michikatsu, were born into the Tsugikuni clan in the middle of the Sengoku period, a time when twins were considered a very bad omen. Yoriichi in particular was born with a strange birthmark on his forehead, which led his father to declare that he would kill him; however, their mother Akeno got angry and arrested him. It was eventually agreed that Yoriichi would be sent to a temple to become a monk at the age of ten.

After their mother’s death, Yoriichi ran away from the house and didn’t stop. After running straight for a day and night with no signs of exhaustion in the mountains, Yoriichi met a girl about the same age as himself named Uta, whose entire family had died. Yoriichi chose to live with her and after 10 years Uta and Yoriichi got married: the first one got pregnant later.

Just before the scheduled arrival, Yoriichi left the house to call a midwife, promising his wife to return before sunset. Along the way, Yoriichi had helped an old man and wasted so much time that he decided to go home and call a midwife the next day. By this time the sun had already set: when he finally got home, he found that Uta and the unborn child had been killed by a demon.


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The tragedy shocked Yoriichi so much that he held her corpse in his arms for ten days in a row and only buried them after a Demon Slayer encouraged him to do so. This led to Yoriichi taking back his blade and training as a Demon Slayer.

Soon, Yoriichi met Muzan Kibutsuji, the ancestor demon and mortal enemy of the Slayers, and decided to kill him. Yoriichi discerned that Muzan had seven hearts and five brains that change position in his body. Seeing his luck, he combined all of his forms into one attack, cutting them all off and overpowering Muzan completely. Muzan would eventually escape, but ended up being completely traumatized by the battle and afraid of Yoriichi.

Yoriichi would end up becoming the strongest of the Demon Slayers. He would pass on his skills to his friend Sumiyoshi, an ancestor of Tanjiro Kamado. He died during a fight with his demonic twin brother when he was more than 80 years old.

Is Yoriichi Tsugikuni the Strongest Demon Slayer?

Based on what we know, Yoriichi Tsugikuni was, indeed, the most powerful Demon Slayer in history. He was powerful enough to almost kill Muzan with relative ease and is responsible for the development of all Breathing Styles. He was born with the Mark of the Demon Slayer, the Transparent World, and the Selfless State, and has a god-like physique and an innate talent for swordsmanship.

As a child who had never picked up a sword before, he could easily defeat a trained sword teacher and was called an incomparable prodigy. After training as a demon slayer, Yoriichi was able to defeat several demons, so much so that his older brother said that as a child he could not even match him as an adult.


As the only one of the demon slayers, he was able to corner Muzan Kibutsuji and overpower him in the blink of an eye, leaving him on the brink of death until he managed to escape. Although he escaped death, Muzan was deeply scarred by the encounter and called him a monster. Even the sight of his earrings made him tremble with terror, and the mere memory of Yoriichi made the bodies of other demons he had never met tremble.

Shortly before his death at the age of at least 85, he fought his older twin brother Kokushibo, who turned into a demon. Despite his advanced age and apparent blindness, he quickly gained the upper hand in the fight, slitting his throat in a single motion before finally dying standing up unharmed. Kokushibo himself admits that he would have killed him if Yoriichi had struck a second blow before dying, while saying that Yoriichi’s power was still in full bloom.

Is Yoriichi Tanjiro’s Dad?

No, Yoriichi is not Tanjiro’s dad; as we know quite well, Tanjiro’s dad is Tanjuro Kamado, as was revealed early on in the storyline. Yoriichi isn’t even related to Tanjiro, as Tanjiro’s ancestor, Sumiyoshi, was only a close acquaintance of Yoriichi’s and someone Yoriichi passed his powers on to, but they weren’t related in any way.

Who Is Yoriichi to Tanjiro?

Well, technically – nothing. Tanjiro shares some similarities with Yoriichi, but they’re not related in any way, nor did they know each other. Yoriichi is much older than Tanjiro and there’s no way the two of them could have met. On top of that, they’re not even related, as Tanjiro is a descendant of Sumiyoshi, who was a close acquaintance of Yoriichi’s but they weren’t related.

Who Is the Voice Actor Behind Yoriichi?

Although he had appeared as a voiceless flashback earlier on, Yoriichi actually made his vocal debut in Season 2 of the Demon Slayer anime, where he was voiced by Kazuhiko Inoue. Since his debut in 1973, Inoue has become one of the most recognized voice actors in Japan.

Her early work in the 1970s included characters like Anthony in Candy Candy, and later Joe in the 1979 remake of Cyborg 009. In the 1980s Inoue’s work ranged from adult-oriented series such as Oishinbo to series popular with the younger generation like Tenku Senki Shurato.

More recently, Inoue is known internationally for the roles of Kakashi Hatake in Naruto, Klarth F. Lester in Tales of Phantasia, Eiri Yuki in Gravitation, You Miyagi in Junjō Romantica, Aiôn in Chrono Crusade, and Hatori Sohma in Fruits Basket. Inoue’s vocal performance is normally described as natural and laid-back.

Kazuhiko Inoue

His wide and versatile vocal range allows Kazuhiko Inoue to portray different types of personalities: energetic characters, firm central characters, such as Joe in Cyborg 009 and Kusanagi in Blue Seed; cold and indifferent like Eiri Yuki; the always hilarious but still very powerful wizard, Guenter in Kyo Kara Maoh!; or dangerously seductive like Aion. Inoue is also known for unusual roles such as the eccentric Nagisa Sawa in Haru wo Daiteita, and Shiron the Windragon in Legendz.

Kazuhiko Inoue not only voices anime, but also voices him for video games, drama CDs, Japanese-language film dubs, and audio books. He has had many albums on LP and CD albums and has performed various “anime character albums”.

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