1. Department of Functional Activation, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, 7‐430 Morioka‐machi, Obu, Aichi 474‐8511, Japan
2. National Center for Geriatrics and Gerontology, Aichi, Japan; and Department of Physical Therapy, Funabashi Municipal Rehabilitation Hospital, Chiba, Japan
3. Department of Speech Therapy, Funabashi Municipal Rehabilitation Hospital, Chiba, Japan
4. Department of Nursing and Care Work, Funabashi Municipal Rehabilitation Hospital, Chiba, Japan