Toaru Majutsu no Index - Volume 10, Chapter 7: The Foe Who Should Be Beaten, The Person Who Should Be Protected. Parabolic_Antenna.

Travel through the Naruto world and be reborn as a dried persimmon ghost shark.

“As a dam maintainer, I carry two hundred catties of lime with me, which is very reasonable and reasonable, right?”

“The so-called unlimited physique means that you are in charge of physique, and I am in charge of unlimited.”

I kidnapped and robbed, didn’t pay my debts, beat up the elderly, bullied children, attacked others without telling the truth, and often killed my superiors and employers…

But I know that I am a good ninja.

I have the heart of a bodhisattva, the face of a vajra, and the means of demons. I walk in the darkness of the ninja world, but I pursue a bright future where everyone is like a dragon.

I, the dried persimmon shark, was born a miscellaneous fish, and swore that one day, I would smash this boring world dominated by blood theory.

- Description from novelbuddy

A mecha otaku is reincarnated into another world as Ernesti Echevalier (Eru). In this world there exist huge humanoid weapons known as Silhouette Knight. Dreaming of piloting those robots, Eru, with childhood friends, Archid Walter and Adeltrud Walter: together they will aim to become a Knight Runner, pilot of Silhoutte Knight.

In a world where reality shifts with every roll of the dice, a man daily partakes in an extraordinary game with the gods, his actions dictated by his decisions and the face of the dice. He takes great joy in this game until the tables turn, and he himself becomes a piece on the game board. Now, the dice are in his hands, and it’s his turn to shape his own destiny. It’s time for the Snowman to play his part.

In the morgue full of Uchiha corpses, he opened his eyes…

A mysterious voice rang in my ear…

He looked confused: “Saving the ninja world, what’s the matter with me, the remnants of Uchiha?”

- Description from novelbuddy