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Of course I'm happy. Following Mikey is like betting on the winning horse. Inupi, you chose a good person.
— Koko's thoughts in joining the Kanto Manji Gang[1]

Hajime Kokonoi (九井 (ここのい) (はじめ) , Kokounoi Hajime?) , or Koko (ココ, Koko?), is a member of the top administration of the Kanto Manji Gang.[5] Prior to his membership in Kanto Manji, he was the 10th Generation Black Dragon Elite Guard Captain[6] and later, a member of the First Division Tokyo Manji Gang.[7] Koko once joined Tenjiku as its Treasurer.[8][9]


Koko has a lean build and tall stature with wavy black hair fashioned in a death hawk style combed to the right, leaving the left side of his head trimmed and split in equal furrows. He appears to have brown almond-shaped eyes in the manga but black irises in the anime adaptation. He has thin arch eyebrows, ovular ears, and fair skin. Koko also wears a golden dangling earring on his right earlobe. He is most often seen wearing the standard Kanto Manji Gang uniform.

When he was younger, Koko's hair was straighter and styled with bangs and a middle part. In the year 2004, Koko had his hair neatly gelled to the right. He would wear the mandatory school uniform, and later, the 10th Generation Black Dragon uniform upon its establishment. During his time in Toman, Koko was only seen sporting casual clothes.[10]

In the latest present timeline where he is an executive in Bonten, Koko grows his hair to shoulder-length and dyes it white while still maintaining his unique parted hairstyle from his teenage years. He wears a different set of dangling earrings on his right ear and has the Bonten logo tattooed on the left side of his head.


Koko commands a group of thieves

Koko sees the world as a series of calculations. This was a result of a traumatic mishap he encountered at a young age, when he failed to save Akane Inui from a house fire that gave her multiple third-degree burns and sent her in critical condition.[11] This event was Koko’s stepping stone to spending his childhood as a leader for an organized band of thieves to illegally amass money for Akane’s costly treatment plan, and simultaneously the beginning of his inclination toward monetary gain.[12] Although seemingly materialistic at first, Koko’s past proves that this obsession was out of hopelessness.

Due to his financial capabilities, Koko is also sought-after by reputable gangs to use him to their own advantage.[13] For this reason, he was regarded as a pawn and his obsession toward money intensified.[14][15]

Koko apologizes for not earning enough money

Upon hearing of Akane’s passing, Koko was unable to face reality and cope with the tragedy as he had failed to earn enough funds to keep her alive, selflessly taking the blame to himself. At a complete loss, he soon attached himself to Akane’s younger brother Inupi as a substitute for her absence, as well as a means of preventing himself from collapsing internally. Eventually, Koko learns to detach himself from Inupi and continue a life of delinquency alone,[16] by which his protectiveness toward him, who he views as a living remnant of Akane's existence,[17][18] is shown.

Skills and Abilities

Financial Capability

Koko has unparalleled financial capability that contributes to his money-making prodigious reputation. After the Inui family's house fire, Koko researched multiple forms of making money by reading books, where he learned profitable methods that a minor like him could execute.[19][20] As a result, he was capable of initiating criminal schemes specific to theft for wealthy clients, then would cyclically invest money in growing his syndicate to perform schemes on a larger scale. This methodology would in turn create greater profits for himself.[21]

His monetary ability is recognized as a well-sought asset among organizations, therefore making him a major figure in multiple present timelines in which he serves as a top executive in the more well-structured and dangerous gang organizations.[22] Usually in charge of the finances, Koko is known as a central piece for an organization's success.


Koko would often take the position of a Treasurer in a gang and be ranked as a member of the top administration.[23][24] His authoritative duties are focused on finances, but he once assumed the position as Elite Guard Captain in the 10th Generation Black Dragon.[6]

Fighting Prowess

Besides his financial skills, Koko is also shown to be a capable fighter, having the capacity to fight in par against Inupi.[25][26]


Manga Appearances
Chapters in order of appearance
Chapter 71: Same old same old
Chapter 72: An old tale
Chapter 75: Let one down (visualized)
Chapter 78: Hey, pal
Chapter 79: Fuck off
Chapter 80: Thicker than water
Chapter 81: Stand alone (flashback)
Chapter 84: Run errands
Chapter 87: Strange bedfellows
Chapter 92: Whip up morale
Chapter 97: Sibling rivalry
Chapter 98: Strive together
Chapter 99: A verbal shot
Chapter 101: Keep mum
Chapter 104: Christmas night
Chapter 105: No one can match
Chapter 106: Dawning of a new era
Chapter 107: Tight-knit
Chapter 111: Season opener
Chapter 113: You have my word (visualized)
Chapter 132: The big baddy
Chapter 133: Sell out
Chapter 139: Make an exception
Chapter 140: Back stab
Chapter 141: Lay out a plan
Chapter 142: Family tree
Chapter 153: NocteKing
Chapter 156: A den of iniquity
Chapter 157: Money monger
Chapter 158: Untamed heart
Chapter 159: I know in my head
Chapter 165: Things change, but not all
Chapter 166: Brave heart
Chapter 167: Who wouldn't
Chapter 168: Headliner
Chapter 169: The home front
Chapter 170: Homecoming
Chapter 176: What was been left
Chapter 185: Meet his fate
Chapter 186: It's been real
Chapter 196: Can say that again
Chapter 206: Let you down (flashback)
Chapter 207: The final act
Chapter 221: Ups and downs of his fate
Chapter 225: Free for all
Chapter 226: Dynamic duo
Chapter 228: Beat hell out of
Chapter 229: Go easy on
Chapter 233: Better late than never
Chapter 234: There is no mending
Chapter 236: Band of brothers (visualized)
Chapter 237: Make allies (flashback)
Chapter 243: Wide array of
Chapter 244: The showdown battle
Chapter 247: Hey dude
Chapter 248: Long time no see
Anime Appearances
Episodes in order of appearance




  • "I did whatever it took! Anything they requested!! Anything that paid!! Then one rumor led to another... and all kinds of people approached me. Izana Kurokawa!! Taiju Shiba! Everyone who came to me had one simple thing in mind. Money." — Koko's frustrations about being used for monetary gain[27]


  • The name Hajime means "one" (一).
  • Hajime's surname Kokonoi means "nine" (九) (kokono) and "well, mine shaft, pit" (井) (i).


  • His special skills are standing behind others (he does not like being in the front) and being a big eater.[28]
  • His hobby is fortune telling with playing cards (Inupi does not trust him).[28]
  • He loves swimming.[28]
  • He does not like ball games because he has bad eyesight.[28]
  • He does not ride motorbikes.[29]


  1. Tokyo Revengers Manga: Chapter 237 (pp. 17 & 18).
  2. Tokyo Revengers Manga: Chapter 79.
  3. 3.0 3.1 3.2 3.3 3.4 3.5 3.6 Tokyo Revengers Character Book 2: Walhalla · Black Dragon
  4. "Erratum and clarification regarding Koko's birthdate". @toman_official [Twitter]. — Following the release of "Tokyo Revengers Character Book 2: Walhalla · Black Dragon", the official Tokyo Revengers Twitter account pointed an erratum regarding Koko's birthdate in the second character book. Koko's birth year was corrected from 1989 to 1990.
  5. Tokyo Revengers Manga: Chapter 243 (p. 2).
  6. 6.0 6.1 Tokyo Revengers Manga: Chapter 79 (p. 2).
  7. Tokyo Revengers Manga: Chapter 111 (pp. 12 & 13).
  8. Tokyo Revengers Manga: Chapter 142 (p. 7).
  9. Tokyo Revengers Manga: Chapter 153 (p. 5).
  10. Tokyo Revengers Manga: Chapter 139 (p. 14).
  11. Tokyo Revengers Manga: Chapter 158 (pp. 1 - 20).
  12. Tokyo Revengers Manga: Chapter 159 (pp. 1 - 6).
  13. Tokyo Revengers Manga: Chapter 159 (pp. 9 & 10).
  14. Tokyo Revengers Manga: Chapter 159 (pp. 11 - 13).
  15. Tokyo Revengers Manga: Chapter 157 (pp. 5, 6, 14).
  16. Tokyo Revengers Manga: Chapter 186 (pp. 12 & 13).
  17. Tokyo Revengers Manga: Chapter 157 (pp. 18 - 20).
  18. Tokyo Revengers Manga: Chapter 159 (pp. 14 & 15).
  19. Tokyo Revengers Manga: Chapter 159 (p. 1).
  20. Tokyo Revengers Manga: Chapter 157 (p. 16).
  21. Tokyo Revengers Manga: Chapter 159 (pp. 2 - 5).
  22. Tokyo Revengers Manga: Chapter 141 (pp. 6 - 13).
  23. Tokyo Revengers Manga: Chapter 71 (p. 9).
  24. Tokyo Revengers Manga: Chapter 141 (pp. 7, 8, 12, 13).
  25. Tokyo Revengers Manga: Chapter 157 (pp. 10 - 14).
  26. Tokyo Revengers Manga: Chapter 159 (pp. 7 - 12).
  27. Tokyo Revengers Manga: Chapter 159 (pp. 8 - 11).
  28. 28.0 28.1 28.2 28.3 Cite error: Invalid <ref> tag; no text was provided for refs named twitter
  29. Official Manga Twitter

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