Prof. Willy Cahill is one of the Founders, past President, and Technical Director of Jujitsu America. Besides running his own dojo, Cahill's Judo Academy, in San Bruno, CA, which celebrates its 60th anniversary in 2008, he coached the U.S. Olympic Judo Teams in 1984 and 1988, the World Team five times, the Pan American Team twice and the Goodwill Games twice. Since 1963, Cahill's Judo Academy has produced over 1000 national and international medal winners, and four Olympic and Paralympic coaches. Coach Cahill was the judo coach at both San Francisco State University and Stanford University. He was head coach of the Paralympic Judo Team that traveled to Sydney, Australia in November, 2000 and brought back the first Gold Medals ever won by the U.S. in Paralympic or Olympic judo competition. The team was ranked #1 in the world in 2000.In 1997, Prof. Cahill started The World of Martial Arts Supplies, a company dealing with martial arts supplies as well as nutritional products, with the majority of his business online at his website. He has developed a set of 3 instructional videos that demonstrate Judo Training, as well as a 6-volume video set demonstrating the arts of Kodenkan Jujitsu. He has also designed a line of judo and jujitsu uniforms for Tiger Claw.Prof. Cahill is honored to serve along with his student Eric Renner as co-coordinator for the Sport Jujitsu Tournaments presented twice a year as part of the Disney's Martial Arts Festivals since 2006, as well as the annual Jujitsu America Sport Jujitsu US National Championship Tournament and other events.

Prof. Willy "Clipper" Cahill I am a 10th dan in Jujitsu, a 8th Dan in Judo.I was born in Honolulu, HI on Nov. 21, 1935. My father John Cahill, Sr. was a well-respected instructor under Danzan-Ryu founder Henry Seishiro Okazaki. When I began my martial arts training under my father while living in Hawaii. I was also treated and cured of a serious illness by Prof. Okazaki. In 1947, the Cahill family moved to California and the following year opened the Cahill Judo Club in Daly City. Soon other schools opened in San Francisco, San Mateo and South San Francisco. I became the head instructor of the dojo after the untimely passing of my father in 1962. In 1963, I built a new dojo in San Bruno and began a new era for Cahill's Judo Academy.

10th Dan in Jujitsu and 8th Dan in Judo

I coached my first International team in 1976 when I traveled with the U.S. team to Mexico City for the Junior Pan American Championships. I eventually coached the U.S. Team at the 1983 and 1987 Pan American Games, the 1983 and 1985 Pacific Rim Championships, and the 1986 and 1990 Goodwill Games. I also coached the World Championship teams in 1981,'85,'87,'89 and '91. He has taken U.S. judo teams to Europe and the former Eastern Block countries, including East Germany, Hungary, Poland, Czechoslovakia, Yugoslavia and the Soviet Union. And he has taken U.S. judo teams to Japan, Korea and Hong Kong several times.

Prof. Cahill has received numerous awards, including being named to Black Belt Magazine's Black Belt Hall of Fame as Judo Coach of the Year, JA's Instructor of the Year in 1979, inducted in 1981 to JA's Black Belt Hall of Fame, was the 1997 recipient of JA's Wally Jay Award, and recognized in 2006 with JA's Patriarch Award.
From 1963 to 1999,Willy Cahill has coached nearly 1000 National and International medal winners. His Elite Athletes have represented the United States at numerous international events. While he was judo coach at both San Francisco State and Stanford University, the women's judo team at San Francisco State won the Collegiate National Championships.
In addition to the consecutive State and National Team Championships, several of Cahill's students have achieved individual success.
Willy Cahill has also served as coach to Stanford University, the U.S. Team for the Pan American Games, the World Championships, and the Olympics. Some of his well-known students include Devi Nelson, Bret Barron, Monica Emmerson, Mike Kessler, and Mike Pechina among countless others. He has also coached blind and disabled Judokas to incredible skill levels.