In Japan, ninjas hold a unique occupation, which can be likened to being an assassin. They are adept at blending themselves with the environment and using both movement and stillness to accomplish their missions. Therefore, they adhere to the "Five Paths of Ninjas" - diet, scent, medicine, breath, and body - to carry out their daily practice and training.
Ninja Hall.
This is the most critical den of Yamaguchi-gumi, similar to the Dark Hall of the Red Bamboo Gang. Its members are all ninjas, possessing terrifying combat capabilities.
It can be said that the Sato Family's control over Yamaguchi-gumi has everything to do with their grip on the Ninja Hall.
Within the dark empire of Yamaguchi-gumi, the Fujii Family exists under the Sato Family. Their primary duty is to train ninja and supply them continually to the Ninja Hall.
The co-chief of the Ninja Hall is the father of Fujiki, the head of the Fujii Family.
