Tenshinso Jigen Ryu Hyouhou (天眞正自源流兵法) is a Koryu Bujutsu founded in feudal Japan by Kaiso Setoguchi Bizen no Kami Masamoto, a samurai from Joshu Kasama (the old name for Ibaraki prefecture today) in early 1500's during the Eisho-Muromachi period(永正室町時代, 1504 - 1521). It is a comprehensive school of martial arts that teaches the Sword (kenjutsu, iaijutsu), Spear (soujutsu), Nagamakijutsu, & Yawara (jujutsu).
This school was regarded as the secret weapon of the Satsuma (present day Kagoshima) warriors, therefore it was only passed down to only one disciple of each generation and royal guards of the Shimazu clan and hidden from outsiders until his 27th headmaster Ueno Genshin opened the doors of Shobukan dojo in 1964.
The major characteristic of the system is Ichi no tachi no gokui, the secret of the first strike, which is the Tenchiichi no tachi, the secret sword of heaven and earth. Its unique form, is performed form Tombo no kamae, the form of dragonfly. Using gravitation, weight transfer and precise techniques that are only taught through oral transmission. Ichinotachi has tremendous power and requires great speed. In fact, fast techniques are distinctive of the the style and can be seen in the iajutsu houkeis constantly practiced.