Kenganverse Wiki

Narushima Koga ( (なる) (しま) (こう) () , Narushima Kōga; "Koga Narushima"), also known as The Fist Eye ( (けん) (がん) , Kengan), is a young man who entered the underground fighting scene and the Kengan matches to attain greater fighting strength. He has some history with Tokita Ohma.[1]

Two years after the Kengan Association VS Purgatory Tournament, Koga had offically become an affiliated fighter within the Kengan matches. He is also the first-ever active Kengan match fighter to enter Purgatory's ring.


A young man, Koga has a lean muscular build, green eyes, and wavy spiked hair; his hair and eyebrows are both bleached white.[4] (his natural hair colour is dark).[5] Outside of his karate gi, he has been shown wearing a button-up dress shirt over a white under-shirt with a gold chain necklace, white pants, and loafers. Koga tends to dress in very stylish, expensive-looking clothes.


Koga is a brash, somewhat arrogant young man who has an intense thirst for overwhelming violent power; to that end, he harbors an underlying inferiority complex stemming from his crushing defeat to Tokita Ohma three years prior. Koga is short-tempered and quickly flies off the handle when his buttons are pressed. Despite this, he can be polite when he wants to be and is also surprisingly diligent, working hard so that he doesn't have to owe anyone. He acts like a backwoods delinquent, for better or worse, though he is gentle towards close friends but shows open hostility against those he considers his enemy.[2] His demeanour is slowly changing after meeting Yamashita Kazuo and the others.

After the closure of Kengan Association vs. Purgatory Tournament, he has attained a calmer, mellowed out personality, showed both in his social life and in the matches. Most notable is his now amicable interaction with Ohma, with Ohma giving him advices on getting stronger during their sparring.


Koga's grandfather raised him as his parents were not a part of his life. Growing up, Koga believed that he was powerless and grew to loathe being weak. At some point, his grandfather dumped him at a karate dojo to teach him morality. It proved to be a pointless endeavor, as Koga used it only to attain power.[5]

Koga mentioned to Kaede that he hadn't studied since the fourth grade and was frequently truant from the fifth grade onward.

At some point, Narushima Joji helped him get into the Rokushin Kaikan, but the organization kicked him out for getting into fights.[4]

Three years before Kengan Omega, Koga bumped into Ohma while the former was out with his posse. Annoyed by Ohma's nonchalance and perceived rudeness, Koga and his posse attacked only for Ohma to trounce them all, calling Koga weak.[6][5]


After challenging and taking down the Ken'okai Hybrid Karate Dojo's entirety, Koga met up with his friend Asari Kosuke. With Asari chastising him for his actions, he then caught Koga on to the idea that there may be stronger opponents if they looked on the Dark Web. Meeting up later, Asari enlightened Koga about the Kengan matches. Seeing Ohma amomg the images, Koga told Asari to do more digging.

Eventually, after being led to Yamashita Trading Co., Koga met the CEO Yamashita Kazuo. Explaining his desire to enter the Kengan matches, Kazuo casually agreed and brought him down to watch a Kengan match featuring Imai Cosmo. Seeing the level of fighting on display, Kazuo coolly informs Koga he was not strong enough to be a part of their world. Undeterred, Koga said he would become the strongest. At that, Kazuo offered Koga a job which the latter accepted.

Living at the Yamashita residence, Koga began working at Yamashita Trading Co., where he met Akiyama Kaede for the first time. Sometime during the day, a young man named Gaoh Ryuki, who had the same face as Ohma, suddenly entered the building. Mistaking him for Ohma, Koga attacked Ryuki to little effect and was quickly overwhelmed until Kazuo's return halted their encounter. While still irritated, Koga then witnessed Ryuki get immediately accepted as a Kengan fighter.

Koga was infuriated that Ryuki became a fighter ahead of him. When Ryuki told him he was too weak to become a fighter, Koga quietly stormed off. In the evening, he called out Utsubuki Kokuro to a deserted alleyway and challenged him for his spot as an affiliated fighter. Despite a confident start, Koga was quickly knocked out and hospitalized (after Kokuro rang him an ambulance).

The next day, a bandaged up Koga went to the Kengan match with Akiyama and vowed that he would discern Kokuro's Stinger during Kokuro's fight with Ryuki.

While witnessing the fight, Koga saw the Stinger, finally figuring out what it was. However, he was unable to determine how Ryuki's Crouching Earth Dragon worked. A few days later, Koga reluctantly attended lessons on how the Kengan Association operated along with Ryuki. When they were introduced to Himuro Ryo and Kaneda Suekichi, Koga mouthed off and was struck in the face by Himuro, beginning a short confrontation between Himuro and Ryuki. During this confrontation, Koga successfully perceived weakness in the Earth-Crouching Dragon, impressing Kaneda.

Following this series of events, Himuro and Kaneda offered to take Koga and Ryuki under their wing. Ryuki refused while Koga accepted, and Kaneda brought him to the SJPW training grounds to meet Sekibayashi Jun. Koga was initially skeptical of Pro Wrestling training's value, even after failing to keep up with Sekibayashi in a squat workout. Sekibayashi offered to let Koga skip his training if he could last three minutes against Jose Kanzaki without being knocked down. Though Koga impressed Sekibayashi with his relentless attacks on Jose, they made little impression on the pro wrestler who didn't even attack for those three minutes. Though Jose didn't fight at all, the event humbled Koga, conceding afterward. After the match, Jose discovered Koga's wish to become a fighter and suggested that he join Purgatory instead of the Kengan Association.

During his wrestling training, Koga had a day off and returned to Yamashita Trading Co. While there, he encountered Katahara Sayaka and Kure Fusui and was informed about the Kengan Association VS Purgatory Tournament. Kazuo offered Koga a chance to become one of the thirteen representing the Kengan Association if he became strong enough in six months. Koga left without telling Kazuo about Jose's suggestion about Purgatory.

Koga improved dramatically over the first two weeks of training; Jose put this down to him, becoming better accustomed to the strength he already possessed. When Yamashita and Ryuki visited him at SJPW, Ryuki declared that Koga's strength as a fighter is a waste. After a short bout with Jose, Ryuki returned to the SPJW dojo when everyone but Koga had left and instructed him on footwork and positioning. Ryuki played 90 rounds of tag with Koga to help teach him footwork; Koga lost all but one round.

After another two weeks of training, the SJPW crew left for a Pro Wrestling tour, and Koga was sent to the Kureishi Dojo by Kurachi Karugo to continue his training. When he arrived, two motorcycle purse-snatchers attempted to rob him, to no avail. When one of them pulled a knife, the Dojo's student, Adam Dudley, arrived and dispatched him. Adam's first test for Koga was to take a slap from him without being knocked down successfully. After swiftly adapting to ice skating, Koga was able to pass Adam's test in an hour before then meeting Kureishi Mitsuyo and Imai Cosmo. Having learned his lesson from the ice skating at Kureishi's dojo, Koga then showed the fruits of his labor after doing some shadowboxing on Kureishi's command.

After a tough session with Kureishi and the boys, Koga, Cosmo, and Adam watched Ryuki's Kengan match. He then watched as Ryuki easily trounced his opponent, Yurikawa Taiju, to attain victory. Koga then bore witness to the main fight of the evening, Nitoku vs. Yuzaki Mumon, correctly analyzing Nitoku's core fighting style as Nitoku soon won his fight. After the fight had finished, Kazuo invited him and Ryuki to watch a Purgatory fight with Kazuo after Toyoda Idemitsu came over to greet Kazuo.

A few days later, upon being requested by Kazuo, Koga took Ryuki shopping. Helping kit Ryuki out in a more modern outfit, the two had an enjoyable day out, with Ryuki thanking him for the fun time.

Finally, Koga took his final exam issued to him by Sekibayashi. With a marked improvement from two months ago, Koga successfully passed the exam. Going back to Kureishi's to tell him of his success, Kureishi mentioned that it was a small world before taking Koga to the Rokushin Kaikan headquarters, with Koga visibly frightened as a result. Inside, Koga sheepishly greeted his uncle before sparring with him, getting put down almost instantly in the process, much to his shock. From then on, Koga began special black belt karate training under his uncle's supervision, also beginning work on a "finishing move."

At home, while eating, Kazuo let Koga know that he would be taking his fighter employment exam in a month, much to Koga's surprise. He then asked Koga and Ryuki to free up a day in their schedule and accompany him to watch some fights at Purgatory.

A week later, the three of them went to Purgatory. Soon joined by Jose, the four of them watched the first fight of the night. During the fight, the 6th and former Fang of Metsudo and two other Purgatory fighters appeared, with the 6th Fang openly antagonizing Jose. When Koga told Jose not to rise to it, the 6th Fang sucker-punched Koga in the liver, dropping him instantly in extreme pain. With Toyoda's arrival diffusing the escalating situation, he helped Koga to his feet and apologized for what occurred. Koga played it off, noting he was glad he came. The next day, Koga told his uncle he had decided on a finishing move thanks to what had happened the day before.

Two days before his employment exam, on his way to go out for dinner with Ryuki, Koga was left in a state of utter shock when he found his friend standing over the corpse of a freshly killed man. Later, at dinner, a visibly shaken and unnerved Koga tried to reason that what he'd seen was a mistake but was left broken when Ryuki casually and bluntly admitted he had killed the man for a "justifiable" reason. Unable to take it anymore, Koga left in a huff, saying they were through.

On the day of his fighter employment exam, Koga took on Murasame Shuya. After a shaky start, he unleashed his finisher and eventually claimed victory, passing the exam. After winning, he, Adam, and Cosmo watched Ryuki's match against Akoya Seishu, after Adam and Cosmo mentioned that Akoya was bad news. Arriving just in time, they watched in horror as Akoya brutally battered Ryuki before Katahara Metsudo's Bodyguards forcibly stopped him. After Ryuki's fight, Koga conversed with him about why he hesitated during his match. With Ryuki musing on Koga's words before about killing people, Koga realized Ryuki was just ignorant to the issue of murder and that he could still "save" him.

That evening, as Ryuki was getting a post-fight examination, Koga was informed of Jose's brutal defeat to the 6th Fang and his subsequent comatose condition. Seeing Sekibayashi in the hospital, the pro wrestler shared his intense feelings to Koga, adding that he and Haruo would leave it to Koga to get Jose's vengeance.

A couple of days later, Koga was present in the Yamashita Trading Co. office when Lihito made his reappearance in Japan. A few days later, Koga viewed the screening match between Lihito and Mokichi Robinson, as the former stormed to a solid victory. He then received a call from Akiyama telling him that Kokuro lost to Hayami Masaki, a mysterious fighter who bore a startling resemblance to the late Meguro Masaki.

The day after, Koga met up with Kokuro, who was contemplating his loss. Kokuro then challenged Koga, telling him if he lost, he would have to give up on trying to get a spot in the tournament roster. Koga was then soundly beaten by Kokuro, who nonetheless praised him for his progress. While the two were eating burgers afterward, Kokuro told Koga he would help him train to get a roster spot.

For the next three months, Koga trained intensely every day, doing basic strength training in the morning, MMA at noon, karate in the evenings, and finishing the days with 1-on-1 sparring with Kokuro. By the end of it, while visiting Jose in hospital, he proudly mentioned he'd put on an extra six kilos of weight.

A few days later, going home with Kazuo, the two encountered Xia Ji waiting for them at home. Koga instantly kicked Xia Ji into their stairs before immediately fleeing with Kazuo in tow. Racing into a tunnel, they were accosted by "Kashio Toru" who revealed his Worm status before attacking Koga. Koga managed to hold his own against Kashio before more Worm reinforcements arrived, making the bad situation worse. Getting stabbed with multiple knives, Koga managed to allow Kazuo to flee before being completely overwhelmed by even more Worm reinforcements. However, he was able to keep fighting up until the Bodyguards saved him, though he was in critical conditions.

While in hospital, he and Ryuki finally met Ohma, to his shock. Ohma thanked Koga for saving Kazuo from the Worm but told him that he wasn't in any condition to fight Purgatory and that he'd replace him, to Ryuki's rage. When the gap between him and the other fighters was also underlined by Kure Raian, Koga merely accepted Ohma's words and the reality of his injuries. Ohma simply left, thanking Koga again while recognizing that he got "stronger." Realizing that Ohma remembered him, Koga became more determined than ever to become stronger.

On the day of the tournament, Koga watched the first two rounds from the stands. After the first round, Koga acknowledged the gap between him and the other fighters, now seeing how far it truly is. In the third match, Koga joined the other fighters in their gate to watch the fights from there. In Ryuki's match against Naidan Mönkhbat, Koga saw Ryuki getting dominated by Naidan's superior strength and technique. He has later deemed the cause of Ryuki's reluctance to kill by Naidan.

With Ryuki getting strangled by Naidan at their match's climax, he watched in shock as Ryuki stabbed Naidan in the neck with his thumb. With Ryuki disqualified, Kazuo and Koga tried to assist him before being threatened by an enraged Liu Dongcheng. As the other Kengan fighters protected Koga and Kazuo, the two helped Ryuki get back to their gate.

In the aftermath of the twelfth match, Koga and Kazuo joined Ohma as he was requested to speak with a dying Wangfang. There he bore witness to being revealed that Ohma and Ryuki were both clones, as well as Wangfang's subsequent breakdown and death.

Power & Abilities

Koga is a capable fighter, being able to take down the entirety of the Ken'okai Hybrid Karate School while sustaining few injuries of his own.[1] He has done the same with three other Karate schools, as well as with kickboxing and MMA dojos.[1]

However, he was nowhere near the level of Kengan fighters. In Koga's brief scuffle with Gaoh Ryuki, the latter was in complete control and exerted seemingly no effort when defending himself against Koga's strikes.[7]

Later, when challenging Utsubuki Kokuro for his position as an affiliated fighter, Kokuro quickly overwhelmed and defeated Koga without much trouble. Koga was said to have two weaknesses that he wasn't aware of, which prevented him from becoming stronger: his footwork precision and his imbalance of tension and looseness. However Koga eventually overcame both weaknesses with the help of Ryuki (via a game of "tag")[8] and Kureishi Mitsuyo (via Adam Dudley's ice skating "lesson").[9]

After training under Sekibayashi Jun at the Super Japan Pro Wrestling gym, Koga's strength and conditioning improved greatly. While he hasn't finished training, his improvements allow him to pull a man off a speeding motorcycle simply by holding onto the bag he tried to steal from him.[8]

Also, having trained his footwork with Ryuki, he could nonchalantly dance around all of the attacks from the motorcycle thief's accomplice.[8] After three months of dedicated training after passing his fighter employment exam, Koga managed to put on an extra 6kg of weight.[3] However, according to the fake Kashio Toru, Koga lacks any "real combat experience".

Perhaps Koga's greatest ability is his amazing observation and martial intuition: Kokuro commended Koga for being able to discern his "Stinger" technique somewhat, something which others he had fought were not able to do;[5] the second time he saw the Stinger, Koga managed to "see" just how the technique worked.[10]

After challenging Koga to a game of "tag" to train his footwork, Ryuki noted that Koga managed to win once out of ninety, despite the fact he wasn't trying to let Koga win.[11] In his training with Adam, despite being a complete amateur in skating, Koga easily kept his balance after a few seconds and managed to pass Adam's test in just an hour.[12] Upon working with his uncle Koga developed to finishing moves: a crescent moon kick and a brazilin roundhouse.

During the Kengan match between Nitoku and Yuzaki Mumon, Koga was able to discern Nitoku's core fighting style after only seeing a few moves (which impressed Imai Cosmo).[13] Koga was later confirmed to possess visual capabilities that rival the famed "Kengan," highlighting his incredible kinetic vision.[14]

Two years after tournament, Koga has been loaned to the Purgatory roster for experience, and is now able to dodge Kokuro's Stinger, where before he initially struggled. Koga proceeds to easily defeat Kokuro without receiving any damage. Koga also believes he could beat Ryuki now. The announcer proclaims Koga as one of the five super nova's, the strongest rookies.

Fist Eye

Koga's Fist Eye ( (けん) (がん) , Kengan), named such due to possessing the kinetic vision that rivals Kazuo and his ancestor's own eyes, allows him to catch things typically invisible to the naked eye. Koga is able to dodge the strikes of Kanoh Agito while it's active, when he otherwise would have trouble without it. While powerful, it's an exhausting ability and leads to a loss of focus if overused. Rolón Donaire had also pointed out it would be ill-advised for him to overly on it.

Pre- Initiative

Koga is currently being taught Pre-Initiative by Rolón and Agito. Koga's over dependance on his eyes make it hard for him to use this technique and he is still new to the technique. However, he is learning and was able to block a surprise punch from Rolón by using his Pre-Initiative.

Notes & Trivia

  • Koga's hobby is collecting vintage clothing.[2] Another of his is studying proverbs (being the only thing he likes studying). However, he forgets everything he learns the next day, so he often gets his proverbs mixed up.[15]
    • His favourite article of clothing are baseball jackets.[16]
    • Despite his initial animosity, he and Ohma have similar tastes in gaudy clothing.
    • Ohma himself seems to taking on a role similar to that of a mentor to Koga, evidently during their current interactions.
  • After training with Super Japan Pro Wrestling, Sekibayashi Jun came up with a wrestler epithet for Koga, Dream Crew Koga Jr. (ドリクル光我Jr., Dorikuru Kōga Jr.). Koga promptly refused the epithet, however.[8]
  • Koga considers his father to be a deadbeat dad.[4]
  • His skills humorously include challenging dojos[2] and sewing.[16]
  • He shares the same epithet with Yamashita Ichinoshin.



v  e Kengan Omega Characters
Assassins & Mercenaries
Heavenly Wolves Nikaido Ren
Kure Clan Kure Erioh · Kure Fusui · Kure Hanjiro · Kure Hollis · Kure Horio · Kure Karura · Kure Raian · Kure Reiichi · Kure Sarura · Kure Yakusha
Wu Clan Alan Wu · Edward Wu · Wu Hei · Wu Xing
Unaffiliated Kuroki Gensai · Muteba Gizenga
Combat Sports Johnny Waters · Kaolan Wongsawat · Kiohzan Takeru · Kureishi Mitsuyo · Okubo Naoya
Pro Wrestling Jose Kanzaki · Kono Haruo · Kurachi Karugo · Sekibayashi Jun
Kengan Association
Ajiro Fisheries Karo Yoshinari
Dainippon Bank Bodyguards · Katahara Metsudo · Katahara Retsudo · Misasa · Nikaido Ren · Omori Masamichi · Takayama Minoru
Gandai Kono Haruo · Shikano Gen · Sekibayashi Jun
General Foodstuffs Sene Rarumaru
Ginokuniya Bookstore Himuro Ryo · Kaneda Suekichi · Ohya Ken
Gold Pleasure Group Kurayoshi Rino
Iwami Heavy Industries Hong Xiao-Hu · Togo Tomari · Yurihama Fusae
Magatanien Kiohzan Takeru · Magatani Juzo
Motorhead Motors Kuroki Gensai · Takakaze Kirimi
Muji TV Atami Hisashi · Ohkubo Naoya
Murder Music Sawada Keizaburo
Nishihonji Security Services Imai Cosmo · Nishihonji Akira
Nogi Group Kimishima Mana · Nogi Hideki
Penasonic Urita Sukizo
SF Cold Storage Lihito
Soryuin Group Soryuin Shion
Suoh Steelworks Suoh Mihono
Taniishi Confectionery, Inc. Taniishi Dango
Toyo Electric Power Co. Hayami Katsumasa · Hayami Masaki
Under Mount, Inc. Yamashita Kenzo
United Clothing Murobuchi Gozo
Village of the Dawn Yoroizuka Saw Paing
Wakasa Life Insurance Akoya Seishu · Hiyama Shunka
Yoshitake Real Estate Yoshitake Yoshiro
Yamashita Trading Co. Akiyama Kaede · Yamashita Kazuo
Affiliated Fighters Adam Dudley · Chiba Takayuki · Gaoh Ryuki · Harada Tokujiro · Johnny Waters · Julius Reinhold · Kaolan Wongsawat · Mokichi Robinson · Murasame Shuya · Narushima Koga · Tokuno'o Tokumichi · Utsubuki Kokuro · Wakatsuki Takeshi · Yuzaki Mumon
Officials & Liaisons Jerry Tyson · Katahara Sayaka · Kure Fusui
Referees Anna Paula · Tashiro Mosashi · Yamamoto Koishi
Representative Toyoda Idemitsu
Gladiators Alan Wu · Arashiyama Jurota · Carlos Medel · Falcon · Fei Wangfang · Jose Kanzaki · Liu Dongcheng · Lu Tian · Mark Myers · Naidan Mönkhbat · Nicolas Le Banner · Rolón Donaire · Terashi · Toa Mudo · Tommy Strummer · Yumigahama Hikaru
Referees Shiina Alisa
The Inside Gaoh Mukaku · Gaoh Ryuki · Himuro Ryo · Tokita Ohma
Rokushin Kaikan Ao Kenji · Narushima Joji
Worm Fei Wangfang · Edward Wu · Kashio Toru · Lu Tian · Naidan Mönkhbat · The Other Tokita Niko · Xia Ji · Yuzaki Mumon
Miscellaneous Asari Kosuke · Hanafusa Hajime · Kanoh Agito · Nezu Masami · Rama XIII · Yamashita Yasuo