The Washuu clan (和修家, Washū-ke) are a ghoul clan that originated from the middle East, that frequently practiced cannibalism over their very long history giving them powerful RC cells even from birth. They are the central family who leads the CCG, having been involved in its formation. Its members have hunted ghouls for well over a century, exterminating them using specialized methods. In 1890, the Japanese government enlisted the family in the founding of the Counter Ghoul Institution (喰種対策院, Gūru Taisaku in), a federal government agency that would manage and pursue ghouls. Since then, its members have acted as prominent officials within the law enforcement agency.
It is noted that Washuu members are known for being serious investigators who are concerned about results and are hard to get along with as they are willing to sacrifice many people to complete their missions, perceiving them only as numbers. The only known exception is Yoshitoki Washuu, who is notable for being hospitable and benevolent to his subordinates.
Eto Yoshimura later claims the Washuu clan has a long-standing alliance with the ghoul organization V. She further alleges that the clan was involved in a conflict with a powerful one-eyed ghoul and this conflict resulted in the formation of the CCG.
Ironically, the Washuu clan is actually comprised of ghouls posing as humans. Using their authority, they have kept their true nature secret since the formation of the anti-ghoul law enforcement agency they administrate. Itsuki Marude discovered their secret through a personal investigation of the family's members. He explains that he found absolutely nothing suspicious except for one minor detail: when he examined the records for the Rc Scan Gates, he noted they registered a false positive whenever a Washuu walked through them.
Genetic Mutation Edit
Having practiced cannibalism for centuries, the Washuu Clan are considered to be "natural-born Kakujas". While other ghouls may develop a mutation in their Rc cells as a result of cannibalism, the Washuu bloodline carries a genetic mutation that causes these cells to naturally develop. Dr. Akihiro Kanou chose to focus on members of the Washuu bloodline in his experiments, in order to take advantage of this enormously powerful bloodline. 
So far, only the One-eyed ghouls created from Rize Kamishiro have demonstrated the abilities typical of a Kakuja. It is unknown why the members of the Washuu Clan have not displayed a kagune or any of the abilities associated with their unique bloodline.
Branch families Edit
The Washuu clan includes numerous branch families, tasked with carrying out different duties. These groups include the main family line, responsible for leading the CCG and being the public face of the larger clan. In secret, they also assign individuals to specific roles within a breeding program meant to preserve the pure-blooded lineage or to produce half-human agents to serve them. These individuals are known as "Seeds" and "Wombs," responsible for siring or bearing offspring to further the clan's agendas. According to Souta Washuu-Furuta, these breeding programs involve incestuous and non-consensual relations between the primary Washuu bloodline and "Wombs."
Main family Edit
- Daikichi Washuu † - CCG Founder
- Yoshiu Washuu † - Chairman
- Tsuneyoshi Washuu † - Chairman
- Yoshitoki Washuu † - Bureau Director
- Matsuri Washuu - Division II Commander, Special Class Investigator
- Iyo Washuu
Branch families Edit
Arima family Edit
- Kishou Arima †  - Special Class Investigator
- Yusa Arima - Ghoul Investigator (Formerly)
- Kishou Arima's mother - Womb
Ihei family Edit
Souzu family Edit
- Kichimura Washuu (Nimura Furuta) - Rank 1 Investigator / Former Bureau Director
- Kichimura Washuu's mother - Womb
- Rize Kamishiro - Womb (Formerly)
- Rize Kamishiro's mother - Womb
- Half-human agents from the Sunlit Garden
- Underground King
- Members of the Washuu Clan add '吉' to their given names, meaning "good luck."
- After slaughtering the majority of the clan Furuta dubs himself the "Washuu king".