Yoriichi's Reincarnation in Tanjiro
In this story, Yoriichi's swordsman skills are reincarnated into Tanjiro since birth. He has the same birthmark as him, and the rising sun earrings. Since he had lots of stamina ever since a small child, he started doing the Hinokami Kagura dance in place of his father, so he already knows how to perform all 12 forms...