Doctor, Tottori University, 1989.
Assistant professor Division Child Neurology, Institute Neurological Sciences, Faculty of Medicine, Tottori University, Yonago, Japan, 1993—1995, Gene Research Center, Tottori University, Yonago, 1995—2002. Visiting fellow Women's and Children's Hospital, Adelaide University, Australia, 2002—2003. Medical chief Kanagawa Children's Medical Center, Yokohama, Japan, 2003—2005.
Associate professor Tokyo Women's Medical University, since 2006.
Health & welfare Concierge of Chromosome and Genetics, Tokyo, since 2008, Kanagawa Down Syndrome Network, Yokohama, Japan, 2002—2008. Member of Japanese Society Child Neurology (Annual award 2005).