Kounosuke Ryuuzenji
Ousama Banchou
Name Kounosuke Ryuuzenji
Kanji 柳禅寺 甲之介
Romanji Ryūzenji Kōnosuke
Title Ousama Banchou (王様番長)
Gender Male Male
Likes Investigation on Kongou species
Dislikes Old Age, Humans
Professional Status
District Aomori Prefecture
Affiliation Dark Student Council
Personal Status
Weapons King's Staff
Fighting Style Corporal Punishment
First Appearance
Manga Debut Chapter 102
Image Gallery

Kounosuke Ryuuzenji (柳禅寺 甲之介, Ryūzenji Kōnosuke) is the Ousama (Majesty) Banchou. He was originally a scientist who worked for the secret government organization Yatagarasu under whose project also Gokurou and Homura participated to train to become the perfect supersoldier for Japan during World War II. Obsessed with the idea of creating a warrior that exceeds the limitations of the Kongou genes, Ousama Banchou did and still does cruel genetic experiments. Originally being small, feisty and weak, he even experimented on himself causing his torso and general body size to alter as he infused himself with the Kongou genes.


The Dark Student Council ArcEdit

Banchou StatsEdit

  • Strength: 10/10
  • Stamina: 10/10
  • Spirit: 10/10
  • Intelligence: 15/10
  • Agility: 5/10
  • Technique: 5/10


  • Penalty Ruler (ペナルティ・ルーラー, Penaruti Rūrā)
  • Bankara Revolution (バンカラ・レボリューション, Bankara Reboryūshon)


  • Ousama Banchou is based on Shintarou Miyazaki's (18) submitted design.