The main line of Ono Ha Itto Ryu was established in the early Edo period, around year 1630. Stemming from Itto Ryu kenjutsu of Ito Ittosai Kagehisa, Ono Ha Itto Ryu was founded by Ono Jirouemon Tadaaki.
Ono Ha Itto Ryu Sokaku-den
The Aizu clan had a long tradition of practicing Ono Ha Itto Ryu kenjustu. Takeda Sokaku learned Ono Ha from Toba Shibuya Sensei at the Yokikan dojo in Aizubange-cho, and mastered this style his late teens. During his musha shugyo around the various dojo of Japan, Takeda Sokaku applied and tested his skills in swordsmanship. After years of experience in kenjutsu, Takeda Sokaku Sensei only kept those sword techniques that he thought were effective and efficient. In this manner he taught his son, Takeda Tokimune, the system now being called Ono Ha Itto Ryu Kenjustu Sokaku-den.