It shocks Choso so badly that it makes him quickly swap to Itadori's side and call him little brother. But these two ... a female sorcerer who was married to Jin Itadori, Yuji's father.

This caused his brother’s soul to be reincarnated ... It was only when he was reincarnated as Jin Itadori, Yuji’s father, that Kenjaku found him to procreate, and from this unholy union ...