Naruto: So This Drunken Sword God Just Wiped Out an Army. No Biggie.

Here is the translation of the novel blurb/synopsis into English: In the Ninja World where jutsu reigns supreme, Ran Yue is an anomaly. His power originates from the strong liquor in his cup! Glug glug glug... Downing half a bottle of spirits, Ran Yue’s eyes blur, his gait becomes unsteady, yet he suddenly feels his combat power spike by 100%! While everyone assumes he is too drunk to stand steady, he punches his Chunin teacher clear across the field! While the enemy assumes he is just a drunkard, he uses a flawless, flowing Drunken Sword Style to slash through all contempt! “What’s wrong? Shall we continue?” “I’m warning you, I have a terrible temper when drunk—once I start fighting, I can’t stop!” Relying on the heaven-defying system that makes him stronger the more he drinks, Ran Yue runs rampant through the Ninja World. He solo challenges the Akatsuki, drunkenly slays Uchiha Madara, and ultimately takes the Hokage seat. In this world, he is the one and only— "Drunken Sword God"!