小野次郎右衛門忠明
Ono Jiroemon Tadaaki
Master of Ittō-ryū and Shogunal Sword Instructor
Description
Ono Jiroemon Tadaaki (1565–1628) was the foremost disciple of Itō Ittōsai Kagehisa and the man who established Ittō-ryū as the official sword art of the Tokugawa shogunate. Appointed as sword instructor to the second shogun Tokugawa Hidetada, he raised Ittō-ryū from a traveling master's personal style to the premier school of the Edo period. His systematization of the Five Forms (Gogyō-no-kata) and the principle of 'ten thousand techniques from one sword' defined classical Japanese swordsmanship. The central stance of modern kendo — chūdan-no-kamae — traces directly to his teachings. The Ono family continued as shogunal sword instructors throughout the Edo period, and Ittō-ryū's influence on later schools such as Hokushin Ittō-ryū and Kenjutsu in general cannot be overstated.
Notable Swords
- Ittō-ryū chūdan sword — a well-made uchigatana of the Shintō period, from the Bizen or Yamato tradition, combining robust construction with practical sharpness; the tool through which Tadaaki expressed the principle that all technique flows from the center
- Sword transmitted from Itō Ittōsai — the blade passed from the founder of Ittō-ryū to his greatest disciple, the material embodiment of the school's lineage and authority