The Black Bunker (黒要塞, Kuro Yousai) is the Kurokami Group's South Pole base, and serves as the second stage of the second Jet Black Wedding Feast.[1] Medaka Kurokami was confined there for a short time by Bukiko Udou, but the base was abandoned to keep Medaka separated from Zenkichi Hitoyoshi.[2]


The interior is standard for a polar base. It has undecorated walls with the pipes still bare. It has a storage room that holds cardboard boxes and books, suggesting that the base is somewhat old. There is at least one cell with chains for restraining a prisoner.[3]


  1. Medaka Box manga; Chapter 145, page 19
  2. Medaka Box manga; Chapter 146, pages 7-8
  3. Medaka Box manga; Chapter 149, pages 4-5