Coreal

Another title: Konoha: Two-Way Travels to One Piece as Uchiha
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The MC, Uchiha Kaito, is reincarnated into the Naruto world as the son of Uchiha Jiri—the creator of Izanami—one of the Uchiha clan's ultimate jutsu.

At the age of six, during his first attempt to extract chakra, he awakens two extraordinary abilities: Space-Time Gate and Heaven Rewards Diligence.

These talents grant him: the power to traverse to the world of One Piece, as well as the road of limitless growth through hard work.

Utilizing his memories, Kaito overcomes his congenital weaknesses and his mother’s depleted life force, extending both their lifespans. 

Then using his knowing of the plot to get all benefits he could get.

With the combined resources and training methods of the Naruto and One Piece worlds—and making full use of his Heaven Rewards Diligence talent—Kaito leads the Uchiha clan toward a path of immortality and ultimate dominance.

The Uchiha Clan will dominate all.
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(Examples of His Progress:)
→[After practicing the Longevity Technique once, your proficiency increases by 1, and your lifespan extends by 1 day.]

→[By surpassing the mastery limit of the Longevity Technique, you gained sudden enlightenment and created the Eternal Life Technique.]

→[Surpassing the mastery limit of the Uchiha Chakra Refining Technique, you realize the Primal Essence Chakra Refining Method.]

→[Breaking the limit of Conqueror's Haki, you gain insight into the Radiance of the Soul.]
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Raw: 木叶:重生宇智波的我，双穿海贼  (from faloo.com)

Table of Konoha: A Uchiha with Space-Time Gate to One Piece

Table of contents

Volume 1