The Mystery Unveiled: Yoriichi Type Zero Mechanical Doll in Demon Slayer

Yoriichi Type Zero, a mechanical doll featured in season 3, episode 2 of the Swordsmith village arc, played a crucial role in Tanjiro's training as a Demon Slayer. This exceptional piece of mechanical craftsmanship was no ordinary doll, but a testament to the skill and ingenuity of its creators, believed to be the ancestors of the talented swordsmith, Kotetsu. With its lifelike movements and reflexes, Yoriichi Type Zero challenged Tanjiro to hone his skills and push himself even further. But what secrets lay behind this remarkable creation?

Yoriichi Tsugikuni

Crafted many years ago by highly skilled swordsmiths, Yoriichi Type Zero was designed to emulate the swordsmanship of the legendary Demon Slayer, Yoriichi Tsugikuni, who is said to have lived 500 years ago during the Sengoku era. Yoriichi was not only the creator of the breathing style techniques utilized by Demon Slayers today, but he was also responsible for developing the sun breathing technique, which the Kamado family mastered. The mechanical doll was specifically created to aid Demon Slayers in their training and to enhance their strength while visiting the Swordsmith Village. To accurately replicate Yoriichi Tsugikuni's swordsmanship style, the doll was given six arms, and it was capable of executing 108 various moves, making it stronger than the average human. In episode 1 of the series, viewers catch a glimpse of Yoriichi in a shared memory (dream) that Tanjiro has while recovering from his fight against Daki and Gyutaro. Upon closer inspection, Yoriichi bears a striking resemblance to another character in the series, Upper Rank demon 1, Kokushibo, who was actually his brother in a past life.

After enduring grueling training sessions under Kotetsu's tutelage, Tanjiro is pushed to his limits and eventually collapses from exhaustion. But in a moment of awakening, he discovers a newfound ability that allows him to see the mechanical doll's movements with greater clarity, enabling him to land a decisive blow. As he recovers, Tanjiro is surprised to learn that the doll contained a more than 300-year-old katana. When a swordsmith named Haganezuka arrives to take the katana, a hilarious misunderstanding ensues, but it becomes clear that Haganezuka has been training in the mountains to create a sword for Tanjiro that won't break easily. With a new sword in hand and the promise of a stronger one to come, Tanjiro sets off on his journey with renewed determination.