Jinenkan "Hall of Nature" comes from several traditional martial arts practiced by Japanese Samurai.

The Jinenkan was founded by Fumio Manaka (martial name "Unsui") in 1996. The purpose of the organization is to allow students to study the martial arts of old Japan freely and unhindered under his guidance. Unsui has 40 years of experience in the Japanese arts of Kobudo (old martial ways).

In Jinenkan Jissen Kobudo, one can study patterns from the traditional martial arts schools:

 • Koto-Ryu Koppojutsu
 • Gyokko-Ryu Koshijutsu
 • Togakure-Ryu Ninpo
 • Kukishin-Ryu Dakentaijutsu
 • Kukishin-Ryu Happo Biken
 • Shinden Fudo-Ryu Dakentaijutsu / Jutaijutsu
 • Takagi Yoshin-Ryu Jutaijutsu
 • Jinen-Ryu Jissen Kobudo.

The Jinenkan offers instruction in Taijutsu (unarmed fighting skills), Bikenjutsu (sword arts), Yari (spear), Naginata (halberd), Tessen (iron fan), Jutte (truncheon), Kusari-fundo (weighted chain), Tantojutsu (knife), Bo, Hanbo, Jo (staff arts), and more.

The Jinenkan has training halls located across the United States, as well as in Europe and Japan. Instructors are at least of the rank of Sandan (3rd degree) and are certified by the Honbu to teach.