Atsushi Tanaka, MD is the director of Saint Mother Hospital, located in Kitakyushu City, Japan. He obtained his postgraduate degree from the Department of Obstetrics and Gynecology of Juntendo University. He established Saint Mother Hospital in 1990, which has since become one of the premier fertility clinics in Japan and now has 5500 ART cycles yearly. He has a long-standing interest in the scientific aspects of reproductive medicine, biology and spermatogenesis. He served as an expert member of scientific committee, Ministry of Health, Labor and Welfare (from 1998 to 2000). He is a vice-president of the Japan Society of Fertilization and Implantation and he organized the annual congress of the society as a chairman in 2008. He is a president of Japanese Institution for Standardizing Assisted Reproductive Technology (JISART), and a councilor of the Japan Society for Reproductive Medicine and the Japanese Society of Mammalian Ova Research. He is joining grant research of Ministry of Health, Labour and Welfare since 2010.