Izasa Choisai Ienao (1387-1488) created the first historically verifiable bujutsu ryu ha (tradition of warfare arts) and revolutionized the study of Japanese combat. This detailed article provides an historical overview of the school, including aspects of its numerous fighting arts. Otake Risuke, 20th generation master instructor, provides details.
SOURCE: Journal of Asian Martial Arts, Vol. 3 No. 2 (1994): 14 pages.