One Piece: Take the Uchiha Clan to the Grand Line

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"How's the construction coming along?" Uchiha Kitaro turned to ask Golden Lion Shiki.

"Reporting to you, Lord Kitaro, the main island and the ten auxiliary islands are complete. However, the other islands still need some time."

"And how much longer will that take?"

"About six months."

Hearing this, Kitaro couldn't help but purse his lips. If he handled it himself, it would have been done ages ago. But who would have thought Shiki was such a perfectionist?

The guy kept tweaking layouts here and there, just to make the islands look even more flawless. It was like designing a video game map—a task that consumed time, energy, and creativity.

Thankfully, Shiki was now an undead specter. If he were still human, he'd probably have kicked the bucket from exhaustion by now.

"Alright, good work."

"Neptune, if you have any specific requests for the islands, discuss them with Shiki. In the meantime, I'll show everyone around."

Kitaro then applied the Light-Weight Rock Technique to the group, enabling them to fly.

"Whoa! I can fly!"

Shirahoshi zipped around excitedly, looking like a mermaid joyfully swimming in the air.

Shisui and Itachi were just as thrilled. Even though Kitaro had tried to teach them the technique before, the chakra control required for Earth Release was just too demanding. Neither had managed to learn it.

Itachi excelled at Fire and Water Release techniques, as well as genjutsu, but his Earth Release aptitude was average. Shisui had high affinity with Fire, Lightning, and genjutsu, but he also struggled with Earth techniques.

Kitaro, on the other hand, was a jack-of-all-trades—a master of all elemental chakra types.

The group flew around the islands. Each one was connected by sparkling water-bridges designed under Kitaro's vision. These one-way flowing bridges arched like shimmering rainbows in the sky, creating the illusion of a floating, vibrant lighthouse.

"This is incredible!"

Everyone couldn't help but marvel at the sight.

Kitaro nodded, clearly satisfied. The beauty of it all was mesmerizing, like something straight out of a cultivation novel.

When you reach his level, if you want something, you get it—plain and simple. That's why he had freed Shiki from prison, turned him into an immortal, and tasked him with building these territories.

If the system demanded high standards, then he would deliver even higher ones.

A floating empire of islands—this alone put the World Government's Mary Geoise to shame in terms of grandeur.

"I plan to invite other nations and species here in the future. We'll have food cities, amusement parks, casinos… The rest? I'll figure out as we go."

"A utopia, huh…" Jinbe was deeply impressed by Kitaro's vision. If this dream came true, it could completely reshape the world.

The group flew to the main island. It was enormous—six times the size of a capital city from Kitaro's past life. Surrounded by mountains, it featured rivers, lakes, and forests.

Kitaro didn't plan to turn the central area into some gaudy kingdom. Instead, he envisioned a small village reminiscent of Konoha.

It wasn't out of nostalgia; he just wanted to avoid the emergence of entitled nobodies like the Celestial Dragons.

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After touring all the islands, the sun had begun to set. Kitaro returned to Amazon Lily with Shirahoshi.

Shirahoshi's ability to communicate with Sea Kings made her a perfect fit for Amazon Lily, located in the Calm Belt. It was the ideal place for her to practice her powers.

In this world, the true rulers weren't humans but the Sea Kings. Shirahoshi's power to summon them was undoubtedly a game-changer.

Unknowingly, Kitaro had already amassed two ancient weapons: the blueprints for Pluton and the living weapon Poseidon.

As for Uranus, he had no leads yet, but he knew Pluton lay dormant in Wano.

Before his reincarnation, Eiichiro Oda hadn't finished One Piece. However, he had hinted that a massive, world-shaking war would occur in the future—something akin to the Fourth Great Ninja War.

Kitaro needed to be ready.

That night, after some "exercise," Boa Hancock looked at Kitaro with a serious expression.

"My husband, you should marry Shirahoshi too."

…Excuse me, what?

Kitaro was caught off guard. He wouldn't deny being tempted, but hearing Hancock openly suggest it was unexpected.

"Shirahoshi is Poseidon, one of the Ancient Weapons. The best way to ensure her loyalty is to make her part of your family. The Fish-Man Island alliance would also become more secure this way," Hancock explained calmly.

"The Fish-Men are a formidable force. They're ten times stronger than humans in the water, and with training, they can become a powerful military asset.

"If you truly aim to rule the world, a marriage alliance with Fish-Man Island would strengthen their devotion to you."

Wait, is my ambition that obvious now?

"Even King Neptune sent Shirahoshi here with this intention," Hancock added.

"Well… let's put that aside for now. First, I need to finish building the empire. Then, I'll make sure to give you the grandest wedding this world has ever seen. After all, you're the woman I love most."

Hancock's heart melted at his words, her eyes overflowing with affection. Just like that, their "battle" resumed into the night.

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Over the next few days, Kitaro played the role of a doting big brother, taking Shirahoshi on various outings.

It was surprisingly enjoyable—a real-life version of a "little sister simulator."

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Once everything seemed to be running smoothly, Kitaro decided it was time to change plans.

He explained his new plans to Hancock and his clan.

Fugaku nodded in agreement. "Yes, it's been nearly a year and a half since we arrived in this world. We left in such haste back then; it's about time we revisited our origins."

"It's really the time to return to Konoha."

Despite their success in this new world, the Uchiha clan hadn't forgotten the Shinobi World or the injustices that had forced them to leave.

The Uchiha would reclaim what they had lost—on their own terms.

"Shisui, Itachi, you're coming with me."

"We will have to prepare for the Uchiha Empire, Konoha will be the first village that we conquer!"

"Understood!"

Both Shisui and Itachi were eager to return and see how things had changed.

"Be careful, my love," Hancock said softly.

"Don't worry. There's no one there who can touch me."

"I'm Uchiha Kitaro, the Heavenly Emperor!"

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