Naruto: Isekai Saiyajin

On the fateful day that the Kyuubi attacked Konoha, a mysterious force emerged from the shadows. Along with the chaos caused by the powerful monster, a gigantic gorilla appears to fight the nine-tailed fox.

However, behind this monstrous body, there is a secret: the gorilla is, in fact, a reincarnated human.

Before being reborn in the world of Naruto, he was a simple anime fan in our world, who ended up being transported to this reality with the body of a Saiyan.