Kae Ito1, Fumiko Ogisawa2, Ko Furuta2, Shuichi Awata3, Kenji Toba4. 1. Research Team for Human Care, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan. 2. Department of Psychiatry, Tokyo Metropolitan Geriatric Hospital, Tokyo, Japan. 3. Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan. 4. Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan.