The Sage Who's Both a Pirate and an Assassin!

Naruto Uzumaki, Nanadaime Hokage, has perished with many regrets. However, through a chance encounter with a god, he finds himself on a mission: if he can assassinate nine tremendously powerful people in another world, he can go back to fix his mistakes. Will he be able to complete such a task, or will the weight of its difficulty be the end of him? (P.S. Not a power fantasy fic.)