About the Author

Irvin Cahn studied Ju-Jitsu at the Ju-Jitsu Institute of Chicago as well as Military Ju-Jitsu from the well-known Professor T. Shozu Kawashima [Fifth Black Belt], who was a captain in the United States Army in The First World War. U. S. Mr. Cahn has taught Jiu-Jitsu to both civilians as well as the U.S. Marine Corps.