Naruto: I Began My Eternal Life in the Warring States Period!

Uchiha Yao's soul transmigrates into the ninja world, where he becomes Madara Uchiha's younger brother. He knows the story of Naruto inside out, but chooses to respect the original plot, intervening only at critical moments to protect his clan and Konoha.

The System grants him power from countless worlds: the Rumble-Rumble Fruit, a Zanpakuto, Pokemon, as well as the Eternal Mangekyō Sharingan and Sage Body.

His strength has already reached the Six Paths level, but he keeps it hidden. Fighting alongside Madara and Hashirama, he ends the Warring States era and helps establish Konoha.

When Madara and Hashirama fall out over their ideals, Yao loses heart, retreats from the world, and goes into seclusion. When the night of the clan massacre arrives, he bursts out of seclusion in a thunderous fury, publicly puts the guilty on trial, and returns real power to the Fourth Hokage.

From adopting Kushina Uzumaki and looking after Tsunade to becoming Team 7's teacher, he guides the ninja world step by step toward unification.

When the Fourth Shinobi World War erupts, he exposes Black Zetsu's scheme, subdues Kaguya, and ultimately travels the world with his harem, witnessing the ninja world flourish and its people live in peace and prosperity.

This is a long Naruto fanfiction about protection, restraint, and bringing an end to an age of chaos.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.