The invincible man at the restaurant who claims to be using his old skills to defeat the enemy is actually a legendary dungeon conqueror.

Description

A world where dungeons began appearing on Earth.

The Shinjuku Kabukicho Dungeon, rumored to be the nation's most challenging, was conquered by an unknown individual.

However, nearly 20 years passed, and the conqueror's identity remained a mystery.

Kenichi Nishida, a forty-year-old middle-aged man this year, made a fresh start, quitting his corporate job to open a casual restaurant in a certain part of Tokyo, but it utterly failed to gain any traction.

After much deliberation, he hit upon an idea:

“If I promote dishes made with ingredients sourced from dungeons on social media, it might go viral.”

Fortunately, he had some experience exploring dungeons during his university days.

『There's this middle-aged guy insisting he's using Minotaur meat he personally defeated.』

『No way a casual restaurant owner could defeat a Minotaur!』『Liar, LOL』

However, he was met with complete disbelief, leading to a deluge of harsh reviews.

Angered by this, he decided to go live.

The result:

『That guy is ridiculously strong, LOL』『Seriously, who IS this guy?』『Is he secretly a high-ranking explorer or something?』

“No, I'm just a casual restaurant owner. I'm simply drawing on some old skills I picked up; I'm fairly confident in my abilities.”

『『『That's WAY beyond "old skills"!』』』

Footage of him instantly defeating not only Minotaurs but even lower-floor bosses was broadcast worldwide, becoming a massive sensation.

Furthermore, it was exposed that he was none other than the conqueror of the Kabukicho Dungeon…?

※This work is also published on Kakuyomu and AlphaPolis.

Published	Title	#
2025/10/10 18:00	Episode 127: No matter how you look at it, he's the most dangerous	127
2025/10/03 18:00	scale battles	126
2025/09/26 18:00	Episode 125: Why are you there?	125
2025/09/19 18:00	Episode 124: How many years has it been since we last met in person?	124
2025/09/12 18:00	Episode 123: Everything up to this point is your speculation	123
2025/09/05 18:00	Episode 122: You have no choice	122
2025/08/29 18:00	Episode 121: Is this the hero who killed the demons?	121
2025/08/22 18:00	Episode 120: It's faster that way	120
2025/08/15 18:00	Episode 119: He almost gets beaten back	119
2025/08/08 18:00	Episode 118: The Gorilla Princess	118

	The old man at the restaurant is unrivaled, saying, "I'm using my old skills..." Kakuyomu https://kakuyomu.jp › works In this world, dungeons have appeared all over the Earth. The Shinjuku Kabukicho dungeon, said to be the most difficult in the country, is conquered by someone. However, the identity of the conqueror remains a mystery until...
	The old man at the restaurant is unrivaled, saying, "I'm using my old skills..." Become a Novelist https://ncode.syosetu.com › ... Kenichi Nishida, a 40-year-old man, decided to quit his job and open a set meal restaurant somewhere in Tokyo, but it didn't take off. After much deliberation, he came up with the idea of creating a restaurant made with ingredients from the dungeon.
	The old man at the restaurant who is unrivaled, saying, "I'll use my old skills..." Become a Novelist https://ncode.syosetu.com › ... Aug 13, 2024 — I, Kenichi Nishida, was at a loss. I quit the company I'd worked for since graduating and decided to open a restaurant. I've always loved cooking, and...
	The old man at the restaurant is unrivaled, saying, "I'm using my old skills..." sinoobi.com http://sinoobi.com › ncode 31 July 2024 — Kenichi Nishida, a 40-year-old man, decided to quit his job and open a restaurant in Tokyo, but it didn't take off. Fortunately, he had a dungeon back in college...
	The old man at the restaurant is unrivaled, saying, "I'm using my old skills..." Kakuyomu https://kakuyomu.jp › reviews It's amazing how this unrivaled, black-collar guy can do anything as if it were a given. What's more, it's also amazing how he's unrivaled in everything, whether it's delicious or not.
	The old man at the restaurant is unrivaled, saying, "I'm using my old skills..." Onolog https://onolog.net › books Kenichi Nishida, a 40-year-old man, decided to quit his job and open a set meal restaurant somewhere in Tokyo, but it didn't take off. After much deliberation, he came up with the idea of creating a restaurant using ingredients from the dungeon.
	Making my old kinezukade private - Status board Alphapolis https://www.alphapolis.co.jp › view 16 Sept 2024 — ... "The Unrivaled Old Man at the Diner, Who Says 'I'm Invincible,' but Is Actually a Legendary Dungeon Conqueror" will be published as a book by a publisher other than Alphapolis. I'm sorry...
	Saryuuto on X: "I'm going to use my old skills..." X · Salyut730 1 like · 1 year ago I read "The invincible old man at the diner, who claims to be using his old kneading skills, is actually a legendary dungeon conqueror"! https://ncode.syosetu.com/n6389ji/ #narou ...
	An Old Man Restaurant Owner Is Unparalleled by Relying ... Novel Updates https://www.novelupdates.com › series › an-old-man-re... Enter Kenichi Nishida, a 40 years old man who decided to quit his corporate job to open a restaurant in a certain area of Tokyo.
	red X · aka_salticidae 9 months ago The invincible man at the diner, who claims to be using his old kneading skills, is actually a legendary dungeon conqueror - Episode 87: Does it make a "Yaa" sound? The dungeon's protagonist...