Yoriichi Tsugikuni is a Demon Slayer from 300 years ago, and the inspiration for Kotetsu's training doll.
Unlike all other marks users in his era, Yoriichi was able to defy fate and lived to about 85 years of age (the average life expectancy during the era Yoriichi was presumed to have been born was between 30 ~ 50 years).
He was a genius when it came to swordsmanship and nearly killed Kibutsuji Muzan all by himself. So now, Tanjiro, the protagonist of the Demon Slayer series, has access to a sword that belonged to the best swordsman to have ever lived.
In episode two, we saw Tanjiro battling against the Yoriichi Type Zero mechanical doll, which was built by Kotetsu's ancestors more than 300 years ago during the Sengoku era.
Shortly before his death of at least 85 years in age, he battled his older twin brother, Kokushibo who turned into a demon. Despite his advanced age, he quickly gained the upper-hand in the battle with a single move, slitting his throat before he finally died standing up, unscathed.
Only two Slayers were ever known to be older than 25 with a Mark. Yoriichi lived till old age, likely due to him having been born with the mark and thereby avoiding the curse altogether. Gyomei on the other hand did not activate his Mark until he was already older than 25.
Yoriichi lived until around 85 years, so: 1432 + 85 = 1517, exactly 400 years prior to when Kokushibo remembered and died.
It was Yoriichi's sword, he found it inside Yoriichi Type Zero doll when he destroy the head. And then hotaru took the sword to fix it. Tanjiro also use Kyojuro's tsuba in this sword.
During episode three we learned that the Yoriichi Type Zero was built by Kontetsu's ancestors more than 300 years ago, during the Sengoku era.
Combat Style
"Breath of the Sun: Thirteenth Style") is the thirteenth form the Sun Breathing and the pinnacle of all Breathing techniques in history. This technique was created by Yoriichi Tsugikuni himself in order defeat Muzan Kibutsuji.
Yoriichi Type Zero ( 緑 より 壱 いち 零 ぜろ 式 しき , Yoriichi Zeroshiki?) is a mechanical battle doll constructed by Kotetsu's ancestors during the Sengoku period.
Katzin brought the sword ashore after fearing it could be further buried under the sea's shifting sands. He then reported his find to the IAA and was given a certificate of appreciation for "good citizenship," an IAA spokesperson said.
Many Kimetsu no Yaiba fans deduce that Yoriichi is Tanjiro's father, but that isn't the case. However, Yoriichi is responsible for teaching Tanjiro's ancestors the Hinokami Kagura, which has been passed down for generations.
In the Demon Slayer manga's final chapter, Yoriichi and his family have been reincarnated and are seen in the deep background of a panel as Tanjiro's own descendants head to school.
Some of the characters who have faced Yoriichi and survived
This happened due to a treatment that had gone wrong. While he was being treated, Muzan killed the doctor because he was not able to observe any results.
Tanjiro's ancestor was a good friend of Yoriichi and arguably was one of his only true friends. Therefore Yoriichi gave the earrings as a gift, and since then they have been passed down the generations until they reached Tanjiro.
Overview. Nichirin Blades can turn into virtually any color dependent on the user and their Breathing Style, however, there is one color that cannot be accessed, which is a bright red color. This color was first discovered by Yoriichi Tsugikuni when he became a Demon Slayer due to his Sun Breathing.
Yoriichi Tsugikuni's Black Sword
Yoriichi, the first demon slayer, used the same sword that Tanjiro found after the Swordsmith Village arc adapted in Demon Slayer Season 3. It is a standard Nichirin katana with a deep black blade.
Michikatsu, who snuck around behind their father's back to see his brother, pitied Yoriichi, who was thought to be deaf until he was seven and clung to his mother's side at all time. At some point, he gave Yoriichi a flute he made as a gift.
10 Yoriichi Is A Longtime Friend Of The Kamados
Although it's interesting that all the Kamado men have the same auburn hair and Hanafuda earrings, there's no blood relation whatsoever.
The episode begins with Tanjiro encountering the ghost of Yoriichi Tsugikuni, the creator of the Sun Breathing technique.
This was because more limbs were required to accurately depict the movements of the legendary swordsman. No one knows the strength of Yoriichi Tsukiguni like his brother does. It is highly possible that Kokushibo manipulated his flesh and decided to have 6 eyes to have better vision.
Despite looking very similar and having the same unique colored hair, Tanjiro is not related to Yoriichi through blood. Hundreds of years ago, when Yoriichi was alive, he came across one of Tanjiro's ancestors, who was being attacked by a demon.