Imai Cosmo
Imai Cosmo4
Kanji: 今井 コスモ
Romaji: Imai Cosmo
Epithet: "The King of Stranglers"
Status: Alive
Age: 19[1][2]
Height: 171cm[2]
Weight: 68kg[2]
Birthday: January 30th[2]
Gender: Male
Affiliations: Nishihonji Security Services
Relatives: Imai Meteor (brother)
Kengan Wins: 23[3]
Kengan Losses: 1[4]
Total Assets Acquired:  ¥79,212,000,000
Manga Debut: Chapter 16
Seiyuu: Natsuki Hanae (drama CD)
Image Gallery

Imai Cosmo (今井 コスモ, Imai Cosmo; "Cosmo Imai"), also known as "The King of Stranglers", is the affiliated fighter for Nishihonji Security Services who is participating in the Kengan Annihilation Tournament.


He is one of the smallest fighters in the Kengan Annihilation Tournament but is still quite defined muscularly with a lean build. Imai has a youthful hairless face, befitting his age, a bob of blonde hair and bright eyes. Around his neck, he wears a necklace with a ring on it.


Imai Cosmo has a very happy-go-lucky personality, and is almost always cheerful and smiling. He is easy to get along with, and makes friends with several of the other fighters, even ones he has just fought. He is a quick learner, being flexible and adaptable.

Imai tends to take risks during fighting, and combined with the fact that his fighting style revolves around submission holds rather than blows, he often ends up coming out of his fights more badly injured than his opponent, even when he wins. While he claims to enjoy fighting for fighting's own sake, and does seem to enjoy the thrill of the fight, it is not until he is nearly killed by Akoya Seishu that he realizes that this is not a love of fighting, but a strong desire to win.

He has a close-knit relationship with his employer, Nishihonji Akira, whom he calls his "bro".


As a child, Imai was getting into fights on the streets day in and day out, until he met Kureishi Mitsuyo, a mixed martial artist who offered to teach him martial arts.[5] Imai proved to be a natural at it, so much so that when one of Mitsuyo's other students, a young businessman named Nishihonji Akira, came to recruit Mitsuyo to fight for his business, Mitsuyo instead referred him to Imai.

At the tender age of 14, Imai became the youngest person to ever debut in the Kengan matches, taking down a giant man 20cm taller and 30kg heavier into submission.[1] He attended high school during most of his tenure as a fighter, and struggled to keep his brother and school friends from knowing about his rather unusual part-time job.


He represented Nishihonji Security Services in the Kengan Annihilation Tournament. As the first fight of the tournament, Imai fought against Adam Dudley in the first round, achieving victory but taking heavy damage in return.

The following contains HEAVY SPOILERS! Read on at your own caution!

In the second round, Imai fought against Akoya Seishu. Despite an extremely brutal fight that nearly made Imai lose his life, he attained victory and passage to the quarter-finals.

However, the first two rounds had left him with significant injuries, forcing him into a wheelchair for a day, and leading Nishihonji Akira to decide to hire Okubo Naoya as his substitute to fight Tokita Ohma in the quarter-finals. Unable to accept this, Imai challenged Naoya to defend his position, then placed Naoya in a hold almost immediately with his newfound Foresight ability. Having successfully defended his position as Nishihonji Security Services' fighter, and betraying the expectations of all those in attendance, Imai entered the arena to face Ohma.

End of spoilers!

Power & AbilitiesEdit

Considered a fighting prodigy, Imai is a jiu-jitsu fighter with high level of agility due to his rather small and lightweight build. Despite his small size he is shown to hit rather hard, as Adam Dudley noted while fighting him. Imai's physical and mental endurance is demonstrated when he tanked multiple punches from Adam, who is capable of knocking people out cold with little motion, and continue fighting efficiently.[5][6] In the battle with Akoya Seishu, despite of being bitten and tortured by Akoya, which broke his ribs and his nearly his will to fight, Imai continued to fight and he defeated Akoya after an adrenaline rush boosted his strength and speed.[citation needed] Furthermore, after the battles with Adam and Akoya, which left Imai heavily injured, Imai could still move fast enough that Ohma could not hit him (moreso due to the fact that Imai was predicting his movements via the use of his new-found Foresight ability).[citation needed]

During the two months between the announcement of the Kengan Annihilation Tournament and the tournament's start, Imai sparred against heavyweight martial artists three times daily; as a result, he is well-versed when fighting larger opponents.[5] True to his status as a fighting prodigy, Imai is able to learn and implement new fighting techniques and applications quickly: after learning how utilise his quick reflexes more efficiently after defeating Akoya and then awakening the ability of Foresight during the battle against Hayami's Guardians,[citation needed] Imai was able to combine and implement these newly learned abilities in his fight with Ohma, enabling him to dominate Ohma in the early stages of their match.[citation needed]

Foresight: After his match against Akoya Seishu, Imai began to develop the ability to predict his opponents' moves in a way similar to Kaneda Suekichi. However, Imai can only predict 2-3 moves ahead (in comparison to Kaneda being able to predict up to 7 moves ahead).[citation needed] By combining this move prediction with his incredible reflexes, Imai is able to counter any moves that he has already seen before.[citation needed] However his Foresight is not an ability that can be used in any situation: when predicting a new move or combination, Imai's reflexes are drastically slowed. It has been predicted that if he combines his Foresight with his Zone, he would become a nearly-unbeatable fighter in time, though at present his ability is far too underdeveloped.[citation needed]


Zone:[6] A technique that is said to be only unique to Imai. This technique involves discerning the 0.1 second interval when the opponent is completely focused on their attack.[6] Once the timing is discerned, Imai then proceeds to move into the opponent's blind spot and put them into a hold. This technique makes the opponent think that Imai Cosmo has disappeared into thin air until he puts them into a hold.[1][6]

Python Hold, Rear Naked Choke:[1] Imai wraps his legs around his opponent's arms in such a way that they are pinned tightly to their torso, completely immobilising his opponent, while also putting them in a rear naked choke hold. In this position, Imai strangles their neck with extreme force, putting pressure on their carotid artery and forcibly shutting down blood flow to the brain. As a result, it causes unconsciousness in around 7 seconds.[1]

Scissor Throw:[5] Imai used this technique to floor Adam and enable moving into a successful mounting position.

Triangle Choke:[6] Imai is able to perform the triangle choke with enough constrictive power to knock out even sturdy opponents like Adam Dudley.

Notes & TriviaEdit

  • At 19, Imai Cosmo is the youngest fighter in the tournament, and quite possibly one of the youngest of all registered Kengan fighters.
  • He has been noted to always be eating when and where possible.
  • Imai has a preferential taste for older, more mature women.[2]
  • Imai is the 2nd most popular character in the series, getting 33115 votes in the official popularity poll.


  1. 1.0 1.1 1.2 1.3 1.4 Chapter 36
  2. 2.0 2.1 2.2 2.3 2.4 Imai Cosmo's profile
  3. 21 wins prior to the Kengan Annihilation Tournament(Ch43)
    2 wins during the tournament after defeating Adam Dudley(Ch46) and Akoya Seishu
  4. After losing to Tokita Ohma during the Kengan Annihilation Tournament
  5. 5.0 5.1 5.2 5.3 Chapter 45
  6. 6.0 6.1 6.2 6.3 6.4 Chapter 46