With a Full Arsenal of Ninjutsu, I Conquered One Piece

Ron transmigrated into One Piece and awakened the Ninja System. Every time he used ninjutsu a thousand times, he could unlock a new technique, and the System would also issue choice-based missions from time to time.

1. S-rank mission: xxxx. Reward: Shikotsumyaku bloodline.

2. A-rank mission: xxxx. Reward: Byakugan bloodline.

From the start, he had the Thousand Years of Death.

Tashigi: "That came out of nowhere. From behind, too..."

Crocodile: "He opened with a Sand Burial on me."

Fleet Admiral Sengoku: "We're both Buddhas, but he said he'd only use one hand against me."

Blackbeard: "I may have had some misconceptions about the Nine-Tailed Fox."

Kaido: "I said I didn't want to dance, so why are you still hitting me?"

Kuina: "How did I get resurrected?"

Look! Those two are playing Go with meteors!

As a pirate, knowing a little ninjutsu for self-defense is perfectly normal, right?

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