One Piece: Starting at the Undersea Tomb

After transmigrating into the world of One Piece, he joins Gecko Moria's tomb-raiding crew. From the start, he helps Moria steal the corpse of the dragon-slaying samurai, the master swordsman Ryuma, and becomes a professional tomb-raiding consultant!

Before long, he discovers that countless ancient mysteries remain unsolved from before the World Government was founded eight hundred years ago!

The origins of Devil Fruits, the origins of the Ancient Weapons, the legend of the D. Clan, the long-buried Ancient Kingdom, the extinct ancient gods, and the Great Grade Swords, most of which have been lost...

Starting with the underwater tomb beneath the Florian Triangle, he begins uncovering the truth and gradually solves these ancient mysteries!

He discovers that this world... isn't as simple as he imagined!

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