Dr. Masaki is a Professor and Associate Chair of the Department of Geriatric Medicine at the University of Hawaii John A. Burns School of Medicine. She earned her medical degree from the University of Bombay, India and completed Internal Medicine Residency training at Michigan State University and Geriatric Medicine Fellowship training at the University of Hawaii.

She has been a Co-Investigator and Clinical Director for the Honolulu Heart Program and Honolulu-Asia Aging Study for the last 16 years, supervised the clinical operations of all the recent examinations, and has served on the HHP Morbidity and Mortality committee. She has extensive experience in phenotype development for aging studies and is experienced in development and testing of data collection instruments, standardized training of staff, quality control, development of our Manual of Operations, the collection and storage of biologic specimens, recruitment, data entry and cleaning, and coordinating examinations for clinical studies. She also has extensive experience with Japanese and Okinawan-American populations. She is a Co-Investigator for the Women's Health Initiative Hawaii Clinical center and is Principal Investigator for an ancillary study, the Women's Health Initiative Memory Study Hawaii center.

Dr. Masaki is the Program Director of the Geriatric Medicine Fellowship at the University of Hawaii and is board certified in Internal Medicine and Geriatric Medicine. She is Principal Investigator of the Hawaii Medical Student Training in Aging Research (MSTAR) grant from the NIA. She continues to work with elderly patients in the clinical setting and has had extensive experience in teaching geriatrics for more than 18 years. She has an extensive peer-reviewed publication record.