Mushin (kiho)

Martial kiho mostly took the form of precise strikes against a targets nerve centers. The strikes were called atemi, and while they rarely inflicted much damage to their target, they could render their target completely immobile. The non-nerve strikes were just normal jiujutsu attacks.

Mushin
The term mushin meaned "thought without thought" and was suggestive of the rigorous, repetitious kata practice these kiho demanded. Mushin kiho depended upon physical contact, practiced to the point where action no longer required thought. Mostly all were delivered via unarmed attacks.