One Piece: Kamui Sharingan from the Start, Beating the Four Emperors

Rosha accidentally transmigrates to the world of One Piece, arriving in Roger's era. Roger, Whitebeard, Golden Lion... All kinds of notorious pirates run rampant in this age!

Fortunately, Rosha awakens a Naruto template after transmigrating. He unlocks the Kamui Sharingan from the start, becoming the only ninja in the world of One Piece! He can also unlock all kinds of ninjutsu and bloodlines from Naruto by hunting down the most evil people!

Flying Thunder God Technique, Rinnegan, Eight Gates, Sage Mode...

Watch as Rosha carves out a place for himself in a world of One Piece ruled by Devil Fruit powers and Haki, relying on his ninjutsu!

Developing Devil Fruit powers to the point of awakening? Useless. Everything is futile in the face of my Perfect Susanoo!

Developing the Three Types of Haki to their absolute limits? Nicely said. Here's a Tailed Beast Bomb for you!

Pirate King Roger: “Rosha! I've trained my Haki to an even higher level! Today, I'll finally break through your Susanoo's defenses!”

Whitebeard: “Damn you, Rosha! Today, I'll definitely find a way around your intangibility!”

The Five Elders: “This Rosha is a terrifying figure who could threaten the world, but we can't beat him. What do we do? Asking online, urgent!”