Dr. Yamanaka is a licensed Internal Medicine in CA. Graduated in 1993. Medical degree obtained from University of Utah School of Medicine. Completed residency training at Kaiser Permanente. Currently practices at Kaiser Permanente (Kaiser Permanente), located at 27303 Sleepy Hollow S, Hayward, CA 94545. Dr. Yamanaka specializes in internal medicine and primary care.. In addition to English, Dr. Yamanaka speaks Cantonese.