Cahill's Judo Academy

Cahill's Judo Academy offers classes in Kodokan Judo and Kodenkan Jujitsu, including Kids Judo, Kids Beginner Judo, Advanced Juniors Judo, and Kids Judo/Kodenkan Jujitsu. The program also includes Teen/Adult Judo, Teen/Adult Kodenkan Jujitsu, Adult Kodenkan Jujitsu, and Teen/Adult Judo and BJJ.

• Ages: 5–18 years old
• Schedule: Classes are offered Monday through Saturday in the late afternoon, evening, and Saturday mornings, with options for kids, teens, and adults.
• Price: 1 Child or Adult $120/month; 2 Children in the Same Family $180/month

Cahill's Judo Academy was founded in 1948 by Professor John Cahill in South San Francisco, and the dojo was later moved to San Bruno by his son Willy. The academy teaches the Danzan Ryu system of jujitsu, established by Professor Henry S. Okazaki in the 1930s. Willy Cahill has been an Olympic Judo coach, Paralympic Judo coach, and Pan Am Games Judo coach, and has also coached other regional and national judo teams and judokas. He holds a 9th degree black belt in Kodokan Judo and a 10th degree in Kodenkan Jujitsu. Cahill's Judo Academy has produced several Olympians and nearly 1,000 national and international champions, and CNN has done a story on Willy Cahill. Tournaments for both junior and senior athletes are held throughout the Bay Area, as well as national and international competitions. The academy offers a free trial class. The mission of Cahill’s Judo Academy states that it honors the legacy of John and Willy Cahill by offering instruction in judo and jiujitsu rooted in tradition and values, and that its doors are open to all regardless of age, ability, or experience.

Last updated August 14, 2026.