what is sukuna's real name

There is no evidence to suggest that Sukuna from Jujutsu Kaisen is based on a real story. It is a fictional character created within the context of the anime and manga's fictional universe.

I don't think there are any elements from real stories for Sukuna. He seems to be a pure work of fiction.

Sukuna does die in the manga. The way it happens is quite dramatic and ties in with many other elements of the story, adding depth and tension to the overall narrative.

Sukuna is a powerful and persistent presence in the manga. So far, no one has succeeded in eliminating him.

No. Ryomen Sukuna is a fictional character from Japanese mythology and modern manga/anime. He doesn't have a basis in a true historical event or person.

Nope. Ryomen Sukuna has no basis in reality. It's a product of the creative minds of the writers and illustrators who designed a captivating fictional character for the enjoyment of the audience.

Sukuna didn't manage to kill Gojo. The storylines and battles unfolded in a way that Gojo remained alive and intact in the manga.

No, Sukuna doesn't kill Gojo in the manga.

No, Sukuna doesn't kill Gojo in the manga. Their battles are intense but Gojo survives.

It could be other elements from Japanese folklore. There are many supernatural beings and concepts in Japanese mythology that might have influenced his creation.