|Spoiler Alert: This page contains spoilers. Read at your own risk.|
The Old Ninth Research Institute, which was officially closed after World War Three, is currently a joint civilian research facility run by the Kudou, Kuki, and Kuzumi Families that researches Perception-Type Magic. 
The Kudou family which has been bred to have a hybrid combination of ancient and modern magic, are suitable for spirit-interference magic and they can perceive spiritual waves.
Makoto, the current Head of the Kudou Family is a shareholder, an investor, and a creditor of multiple Defense Force Contractors. 
The mansion is a luxurious three-story Western-style building that wasn’t originally built to withstand attacks from individuals such as "Traditionalists". When incorporating research from the Ninth Institute, the defenses had since been strengthened in small increments. The decision to locate the mansion here had been decided by the government in order for the Kudou Family to monitor Osaka in order to suppress foreign Magician operatives. 
Area of Influence
The Kudou Family's influence encompassed specifically the Kyoto, Nara, Shiga prefectures and Kii. During the Master Clans Conference held every four years, the Head of the Kudou Family had given a report on the status of the regions it monitored. Although, now by request of Shippou Takumi of the Shippou Family, the Houses of Nine still manage the regions. 
- Former Family Head : Kudou Retsu (九島 烈) - (Deceased)
- Children :
- Kudou Ken (九島 健) - He possessed a greater ability to use Parade than Retsu himself.
- Angelina Kudou Shields (アンジェリーナ゠クドウ゠シールズ)
- Family Head : Fujibayashi Nagamasa (藤林 長正)
- Wife : Younger Sister of Kudou Makoto