Who is the strongest? All the tournament entrants have arrived! A martial arts tournament to decide the strongest corporation and fighter in Japan has begun! Judo fighters, pro wrestlers, riot police, mixed martial artists, sumo wrestlers, mercenaries, serial killers, classical martial artists, etc. 32 fighters who believe in their own strength, and the 32 corporations that hired them, clash with their pride and interests on the line!!!!

"The Superman" Lihito, who can rip and tear through flesh with his superhuman pinch grip, faces off against a karate master, "The Devil Lance" Kuroki Gensai! Next, "The Beautiful Beast" Kiryu Setsuna, with his pathological obsession with Ohma, fights "The Watchman" Nikaido Ren, who is making maneuvers behind the scenes of the tournament. More mixed martial arts, cross-industry battles of pride are about to begin!!

It's time for a punching machine contest! Will the power of Hibiki's punch reign supreme once again? Also, why the heck is Jason in prison?

MUSCLE OTAKU! Zina is thriving in her new life as a Russian exchange student in Japan! She loves anime, cosplay, and idols—but she’s not just a fan. She wants to be an idol, too! Can she convince her new friends to form a muscle-building idol group?!

It's sumo vs. pro wrestling!! Kiozan, the problem child of sumo known as "The Brawler of the Sumo Ring," faces "Hell's Angel" Sekibayashi Jun, the star of pro wrestling! The match starts with Sekibayashi on the ropes from Kiozan's wild rush! Who will be left standing in the end: Sumo or pro wrestling!?

Public combat sports vs. underground martial arts... Who will win the final match of Round 1? There are two matches left in the first round of the tournament!! Kaolan Wongsawat, the heavyweight boxing champion, clashes with Kaneda Suekichi, the man who fought for his place in the tournament! Then, the "King of Combat," MMA champion Okubo Naoya, faces off against "The Fang of Metsudo" Kanoh Agito, who has reigned as emperor over the Kengan Association. A fight for the "strongest," fitting for the last match of Round One, begins!!

Business meets violence. The ultimate fighting manga begins! Yamashita Kazuo is a 56-year-old man with a broken home stuck in a dead-end job, but suddenly he gets called in by the president of his company! The timid Yamashita Kazuo learns the truth about the Japanese economy: that corporations are wagering massive profits on martial arts fights between hired fighters. They are called the Kengan Matches!!!! Kazuo is given a mission to manage their company's fighter: a young man who is violence embodied named Tokita Ohma!!! What lies in store for Yamashita Kazuo...!!?? Violence meets business meets human drama. Why do men fight? What do they grasp with their fists? The ultimate martial entertainment begins here!!!!

The timid old man Yamashita Kazuo has found himself caught up in a ring of marital arts matches where corporations wager massive profits on martial arts fights between hired fighters. They are called the Kengan Matches!! Kazuo is given a mission to manage their company's fighter: a young man who is violence embodied named Tokita Ohma. What will grow between them across the age gap? Friendship? Submission? Or something else...?? It's a passionate drama where a 56-year-old can still grow... The fierce fights between hardened gladiators is about to begin!!

The first round of the Annihilation Tournament begins!!! A martial arts tournament to decide the strongest corporation and fighter in Japan has begun!!! 32 fighters and 32 corporations clash with their pride and interests on the line... Which one will win...!!?? The tournament bracket is announced... And the unmissable first round is finally underway!!!

A fisherman's pride clashes with a boxer's grit! The first round of the tournament has moved into C-block! Corporations are wheeling and dealing behind the scenes!! "The Giant of the Sea of Japan" Karo Yoshinari faces "The Howling Fighting Spirit" Yoroizuka Saw Paing and "The Land from the Land of Dreams" Nezu Masami fights "The Lightning God" Mikazuchi Rei in a mixed martial arts, cross-industry battle of pride!!