Hi, it’s Junko from Japan! Is YORIICHI related to TANJIRO in Demon Slayer? No, he isn’t. Yoriichi looks like Tanjiro, but they don’t have any blood relation.
Originally, Yoriichi lost his wife and a baby inside her belly. He remained single for the rest of his life, and his lineage didn’t continue.

For your information, Tokito Muichiro is a distant descendant of TSUGIKUNI MICHIKATSU, an older brother of Yoriichi. That means it’s Muichiro who is related to Yoriichi.
I think it’s Tanjiro’s father, KAMADO TANJURO, who resembles Yoriichi rather than Tanjiro. They both had a calm and moderate atmosphere. Also, Tanjuro was born with a red mark on his forehead and reached the transparent world.
The red mark is a symbol for the legitimate successor of the Sun Breathing. Though Tanjuro’s body was weak, it seems his soul and ability were very close to that of Yoriichi.
Is it Tanjiro the Reincarnation of Yoriichi?
Then is Tanjiro the reincarnation of Yoriichi? I suppose not. It’s true that Tanjiro witnessed Yoriichi’s past. But that was a memory he inherited from his ancestor KAMADO SUMIYOSHI. If Tanjiro was truly the reincarnation of Yoriichi, he must have seen it from Yoriichi’s view.
Who Is Yoriichi to Tanjiro?
To Tanjiro, Yoriichi is a friend of his ancestor. Yoriichi met Kamado Sumiyoshi and gave him two things. One is the Sun Breathing technique and Sumiyoshi passed down it to his ancestor as the Hinokami Kagura (Dance of the Fire God). The other are earrings that were a keepsake from Yoriichi’s mother.
The Hinokami Kagura and the earrings have been inherited by the oldest son of the Kamado family, and the latest (and the last) successor is Tanjiro.
Related Posts about Demon Slayer
What Does Yoriichi’s Sword Say in Japanese?
What Is TANJIRO’s Name Meaning in Japanese?
Does Tanjiro Become a HASHIRA? What Is His Strength Level?
Why Did Muzan Turn Nezuko into a Demon?
What Does MUZAN Mean in English? The Origin of His Name in Demon Slayer
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