No Challenge
The techniques of Hakkoryu are nothing but the pure self-protection instinct that prepares your spirit to face urgent matters of life and death. That is, when one encounters violence, it can be said that Hakkoryu provides natural, simple, and practical methods that enable one to calmly face imminent peril and move on without hesitation to capture and punish assailants reasonably and easily in an instant - Ryuho Okuyama, Founder, Hakko Denshin Ryu JuJutsu