"Dr. Hatsumi said that Budo and Medicine were linked, the Yin and Yang (In/Yo) of the art, and both had Taijutsu Natural movement at their heart"
The teachings of ANMA were integrated and taught alongside the martial arts, and warriors would have extensive knowledge on these healing teachings.
Warriors would use the same ‘kyushu’ vulnerable places and acupoints on the body to Harm and Heal, and used these skills to be able to help and assist injured comrades during or after battle.
Dr. Hatsumi explained that this was the Yin and Yang (In~Yo) (Martial/Medicine) of the art.
When wearing armour, only vulnerable places could be used to harm or heal. So the study of these places became part of the Ninjas training.
Dr Hatsumi explained that during battle you may only be able to get at a comrades fingertips, so you had to have knowledge of how to bring harmony and balance to the body, using only these vulnerable places or 'kyushu'
'Kyushu' translates as point of vulnerability or point of change. Dr Hatsumi explained the use of natural body movement (Taijutsu) was important to effect these vital places, to harm or heal.