[Endscape]

Originally Posted by Mad Pierrot

Spoiler for spoiler:

Wait, we knew he was Kenjaku's creation some time ago but the dream also had a guy named Jin holding Yuji as a baby and I think Tsukumo said there was a woman named Kaori Itadori.

At least it explains why Yuji has so much power despite not training that much he said some chapters ago. I guess this might explain what are those red arms

Spoiler for 257:

Basically Yuji's dad Jin Itadori was the reincarnation of Sukuna's little brother who he ate and killed in the womb. Kenjaku procreated with him to him to create a vessel capable of holding Sukuna that would be born as a player in the Culling Game. The red arms are likely a result of Yuji eating Death Womb Paintings 4-9