Mikogami Tenzen (神子上典膳?) or Ono Jiroemon Tadaaki was a Japanese samurai of the early Edo period, who was renowned as a swordsman. He founded the Ono-ha Ittō-ryū style of swordsmanship after his teacher made him head master of the Ittō-ryū. He was one of two official sword masters for Tokugawa Ieyasu and his style, along with Yagyū Shinkage-ryū became one of the official ryūha of the Tokugawa Shogunate.
Tenzen (典膳), meaning assistant cupbearer (for the Emperor) seems to have been a court title under Ritsuryō system, Tadaaki got as an honorific from the Bakufu.
- Kendo: Elements, Rules and Philosophy Copyright(c) Jinichi Tokeshi