Jujutsu Kaisen: Reincarnated as Hajime Kashimo

A JJK fan from Earth is reincarnated into the body of Hajime Kashimo, the Strongest Sorcerer from 400 years ago. To avoid being carved into the infamous panels against Sukuna, he begins an insane training regime. Not satisfied with jujutsu alone, he applies his knowledge of physics to refine his electromagnetic powers and develops his own unique, lethal Domain Expansion. As the inevitable moment draws near, this new showdown between Kashimo and Sukuna will be completely different from the manga. — Description from novelcodex.org