510 Judo

510 Judo is a martial arts school located at 1029 Macarthur Boulevard in the Estudillo Estates neighborhood of San Leandro, California. The dojo provides traditional judo instruction for children, teenagers, and adult practitioners across all experience levels. Instruction is directed by sensei David Quinonez alongside a staff of experienced martial artists. The training facility is equipped with Dollamur foam judo mats placed over a custom-built floating subfloor engineered for student safety. Programming features Tiny Judo for children ages 3 to 5, youth judo for ages 6 to 16, and comprehensive adult classes covering Olympic sport judo rules, classical throwing techniques, and no-gi submission grappling. Classes are organized throughout the week for beginner through advanced students. Prospective practitioners and local families can register online for a complimentary trial class to tour the training facility and experience instruction on the mats.