Nakai Masakatsu (中井 正勝, fl. 1891–1908), a teacher whose own teachers had been proficient in Shinkage Ryu and Yagyu Shingan Ryu Taijutsu, taught these arts to Morihei Ueshiba (the founder of aikido) from 1903 to 1908, in his dojo in Sakai near Osaka. At the time, Ueshiba was serving in the 61st Regiment in the Japanese Army. In 1908 Masakatsu gave Ueshiba a mid level license in Gotōha Yagyū Shingan Ryū Taijutsu. Yagyu Shinkage-Ryu was also taught in the United States from 1981-1988 by Yagyu Hideki.
Bokken in aikido goes back to this Ryu Katsujiin-ken ( The one who protects Life)
Nishio, Shihan named it "The Life Giving Sword"
Do not stop the mowments of your ennemy, but adapt to his rythem.
Moving with the wind.
Mind leading Body.
Going to Yagyu - Sword agains bare hands - Muto.
