To encourage Toshio and the nikkei, Asuka invites them to his next match. Covered in blood, Asuka and Igarashi sink their opponents into the mat. The joyful nikkei toss them into the air to celebrate. Meanwhile, unable to control Asuka and Igarashi, Todd sells their contracts to the infamous match-fixing wrestler, Great Togo. What future awaits Asuka and Igarashi in the ring?
Asuka and Igarashi, who defied Great Togo’s orders and won the fixed match, are surrounded by a group of mysterious men armed with pistols and rifles. Asuka barely escapes certain death, but their safety is short-lived. Asuka finds himself in grave danger again when the gangsters point their machine guns towards him! Will Asuka be able to escape certain death twice?
After being rescued, Togo flies to Hawaii with Asuka and Igarashi to arrange a match. However, the local promoter gives Togo the cold shoulder, and Igarashi collapses from exhaustion. Meanwhile, Asuka is mistaken for a pickpocket and is forced to fight a large Japanese man. Who could this man be?
Tam Rice, the man with the Scorpion Punch is plotting to stop Rikidozan’s winning streak. To strengthen his karate chop, Rikidozan asks Asuka to be his coach after learning the power of Asuka Karate. How far can Rikidozan extend his winning streak with his new powerful karate chop?
The Red Scorpion, who defeated Rikidozan with one punch, gloats about being the karate killer. To defend karate’s honor, Asuka courageously challenges him! Their showdown is to be a deathmatch, a fight that goes on until one fighter sinks the other into the mat. Who will be victorious? Asuka Karate or the Red Scorpion?
After defeating the Red Scorpion, a former boxer, Asuka challenges Henry Arthur, a first rate heavyweight boxer. Asuka takes on Arthur head on, despite his dynamite punch that can kill him with one hit. Asuka receives several blows from Arthur and is repeatedly knocked down into the mat. Barely conscious, Asuka fights back with his karate punch. Sparks fly as the two fighters clash, fist to fist! Who will be victorious?
A man representing Muay Thai, thought to be the strongest martial art on Earth, sends Ken Asuka an official challenge. With his fighting spirit ignited, Ken Asuka travels to Thailand. However, two brothers, who wish to rule the Muay Thai world once more, target Asuka. Unable to see his opponent who is underwater, Asuka is attacked with a powerful kick! Who is the mysterious fighter?
In terms of kicks, Asuka and the Black Cobra, the King of Muay Thai, are equal in speed and power. It’s thought the match would be won by a razor thin victory. However, Asuka struggles with wearing gloves for the first time, which diminishes the power of his punch. The Black Cobra’s back-to-back kicks graze Asuka’s body. Will Asuka be able to defeat the King of Muay Thai?
Somvan, a troubled boy, tramples all over Asuka’s feelings by gambling on his match against the Black Cobra. Not only that, Somvan steals the boxing gloves Asuka gives to Saeki as a gift. Furthermore, a mysterious gang wielding knives attacks Asuka while he’s asleep. The knife stabs the bed, and Asuka is in grave danger! Will Asuka's precautions save his skin?
After learning about Pencak Silat, a Balinese martial art that uses two swords, Ken Asuka flies to Bali. However, he learns that mixed martial art bouts are forbidden in Bali. Then, a disappointed Asuka encounters a man name Seoro, a top Silat fighter who killed a boxer. Will Asuka have an opportunity to test his skill against Pencak Silat?
Ken Asuka travels to New Zealand to meet Chief Upol of the Maori people, who is said to use a sickle similar to a boomerang. Once there, Asuka enters the Lumberjack Competition, part of the Easter Parade festivities. However, a man named Arthur, who also uses a Maori sickle, challenges Asuka to a bout. Will Asukabe able to defeat the Maori man who lost his way?
Asuka heads to Brazil when Handa, a wealthy Japanese farm owner, asks him to teach his staff karate. However, there’s a man who is hostile towards Asuka Karate at the farm. O’Hara, a Brazilian Capoeira fighter, suddenly does a handstand and attacks Asuka during a party. A disgruntled O'Hara kidnaps Maya, Handa's daughter, for ransom but Maya seems somewhat complaisant. Will Asuka be able to stop Handa from killing O'Hara for kidnapping his daughter?
After reading the newspaper article, “Tony Jack defeats Ken Asuka,” Asuka, shaking with anger, returns to the US to learn the truth. He discovers Tony Jack, a former wrestler known as the Giant, concocted the story by defeating a Japanese man pretending to be Ken Asuka. To protect karate’s honor, Asuka faces off with Jack! Will Asuka be able to show Tony Jack the true might of karate?
Ken Asuka flies to France after an invitation by Joe Brad, a man who enjoys watching martial arts bouts from all over the world. While stunned by France’s traditional martial art, Savate, and its kicks, Asuka fearlessly challenges a Savate fighter. However, he struggles against Beaumont, a Savate fighter who uses a strange kick unlike any in karate. Will Asuka pull off a karate feat that has never been done before?
After learning Asuka’s strength, Joe Brad suggests he take part in Hell Wrestling at a nightclub. Asuka realizes Hell Wrestling is just a show using fake blood and enrages Kaiser, the boss of the entertainment world. A large invisible shadow looms down on Asuka. Abandoned by his sponsor, Asuka is reduced to being a beggar?!
Kaiser points a gun at Asuka, who refuses to relent to his pressure, and forces him to take part in an underground wrestling match. Asuka is stunned by the fierce battle where fighters' lives are truly at stake. However, after seeing Rogovski, the Underground King, in a bout, Asuka decides to fight. Will Asuka survive the underground deathmatch?
Rogovski proudly boasts his win and lets his guard down, when Asuka makes a comeback strike. Asuka believes he’s won, but Rogovski uses his Giant Swing for the win. Asuka escapes certain death, but Kaiser threatens to keep Asuka as an underground wrestler. Will Asuka see the light of day again?
On his way back to Japan, Asuka stops in Hong Kong. He meets Old Man Chen, a Chinese martial artist and requests a bout. The moment they face each other, Asuka is certain he can defeat him with one strike. However, Asuka quickly learns Chen is incredibly skilled and can dodge his attacks with ease. Will Asuka’s victory over Chen prove to be elusive?
After returning to Japan, Asuka opens a small dojo and pours his passion into training his apprentices. However, an incident rattles Asuka’s heart. A young apprentice named Takatsu starts a fight against the town yakuza. Asuka rushes to save his apprentice! And to teach him the difference between a street fight and the karate way. Will Takatsu end up following in Ariake's footsteps?
Four strange men show up at the dojo while Asuka is away. The men turn out to be Tai Chi fighters, who command great destructive powers using their Tai Chi moves. The four men attack Asuka, who is training by himself on Mount Minobu. Four against one. Tai Chi versus karate. Their fierce shouts echo through the quiet Minobu mountain range. Will Asuka be able to defeat them despite being outnumbered?
After defeating the Tai Chi fighters, Asuka realizes he strength is no longer what it was, and continues to train by himself on Mount Minobu. However, Yahachi, a Shaolin master who also lives on the mountain, discovers Asuka’s weakness. With his ambitions to defeat the strongest fighter in the world, he marches into Asuka’s dojo. After handily defeating Asuka’s apprentices, Yahachi makes Fubuki, his son, challenge Asuka. Will Asuka's experience let him win or will Fubuki's youth prove to be too much?