This is a list of investigators who have appeared in Tokyo Ghoul and its sequel Tokyo Ghoul:re until now.
Investigators are employed by the Commission of Counter Ghoul to investigate in crime scenes assumed to be caused by ghouls. The CCG employs two kinds of investigators; ghoul investigators and bureau investigators. In addition, the CCG sometimes employs investigator assistants (捜査官補佐, sōsakan hosa).
The investigators are sorted by rank.
Ghoul Investigators
- Main article: Ghoul Investigator
Special Class Investigators
- Koutarou Amon (Defected)
- Kishou Arima †
- Kiyoko Aura
- Kousuke Houji †
- Fujishige Iba (Retired)
- Iwao Kuroiwa
- Itsuki Marude
- Yukinori Shinohara (Resigned)
- Juuzou Suzuya
- Mougan Tanakamaru (Resigned)
- Koori Ui
- Mikito Urie †
- Matsuri Washuu
- Tooru Mutsuki
Associate Special Class Investigators
- Arine †
- Daisuke Atou †
- Mutsumi Chino (Status Unknown, Declared Dead)
- Chuu Hachikawa †
- Shiki Kijima †
- Akira Mado (Defected)
- Kasuka Mado †
- Haise Sasaki (Defected)
- Kuki Urie
- Taishi Fura
First Class Investigators
- Naoto Hayashimura
- Take Hirako (Defected)
- Ayumu Hogi
- Hairu Ihei †
- Kenta Isai
- Juuji Isoyama
- Kuramoto Itou
- Yukio Kurodawara †
- Kureo Mado †
- Keijin Nakarai
- Niharu †
- Ryouta Ooshiba †
- Nobu Shimoguchi †
- Hirokazu Tainaka
- Hidenori Tateshima
- Yanagi
- Yusa Arima
Rank 1 Investigators
- Hanbee Abara
- Tomonori Akai †
- Ching-Li Hsiao
- Takeomi Kuroiwa
- Tougo Kurumatani
- Katsuya Mabuchi
- Shinji Michibata †
- Miyuki Mikage
- Okahira (Defected)
- Shion Satomi †
- Ryuuta Sawaike †
- Shunichi Shibashi †
- Mizurou Tamaki
- Miho Toga †
- Kichimura Washuu † (Resigned)
- Fuuma Yukimichi
Rank 2 Investigators
- Waka Asachi †
- Shinsanpei Aura
- Haru Fujimi
- Misato Gori
- Shougo Kukiyama
- Sakino Mura †
- Yasuhito Nezu †
- Jun Numa †
- Yuuta Okamochi †
- Ginshi Shirazu †
- Erina Tagata †
- Seidou Takizawa (Defected)
- Hina Tougi †
- Masami Umeno †
- Saiko Yonebayashi
- Toujou
Rank 3 Investigators
Unknown Rank
- Shio Ihei † (Defected)
- Rikai Souzu † (Defected)
Bureau Investigators
- Main article: Bureau investigator
Rank 3 Investigators
Unknown Rank
- Murata
- Yasutomo Nakajima
- Ruisawa - Information Head
Investigator Assistants
- Hideyoshi Nagachika (Defected)