Underground expedition

The underground expeditions are special investigations series directed by a certain group of ghoul investigators, which gets carried out in Tokyo's 24th ward. The main goal may be solving the underground labyrinth.

Special Class Ghoul Investigator Kishou Arima is an important manager for these investigations.

Alive

 * Akira Mado
 * Juuzou Suzuya
 * Kishou Arima

Deceased

 * Harima
 * Kureo Mado (died outside the expeditions)
 * Kureo Mado's wife