Onikuza

One of the most powerful crime syndicates in The Mountain of The Rising Sun, The Onikuza was founded and led by Gold-Ki. As the name implies most of their members were Oni, a race of monster-like creatures who believe physical strength is equal to respect most of them love battle and violence. 
After the death of Gold-Ki by Ivan most of the power the Onikuza once held was taken away as they are now just remnants of what they used to be.