Minamoto no Yoshimitsu, son of Minamoto no Yoriyoshi, was a Minamoto clan samurai during Japan's Heian Period. His brother was the famous Minamoto no Yoshiie. Minamoto no Yoshimitsu is credited as the ancient progenitor of the Japanese martial art, Daitō-ryū aiki-jūjutsu. Yoshimitsu is also known as Shiragi Saburō.According to Daitō-ryū's initial history, Yoshimitsu dissected the corpses of men killed in battle, and studied them for the purpose of learning vital point striking (atemi) and joint lock techniques. Daitō-ryū takes its name from that of a mansion that Yoshimitsu lived in as a child, called "Daitō", in Ōmi Province (modern-day Shiga Prefecture).