1. Background:  Recent medical advancements, and improvements in hygiene and food supply have led to Japan having the longest life expectancy in the world. Over the past 50 years, the percentage of the elderly population has increased fourfold from 5.7% in 1960 to 23.1% in 2010. This change has occurred at the fastest rate in the world. Compared with France, where the percentage of the elderly population has increased just twofold in the past 100 years, Japanese society is aging at an unprecedented rate. In addition, the percentage of the very elderly (aged 75 years and over), comprising more frail people, exceeded 10% of the nation's population in 2008. In such a situation, many elderly Japanese wish to spend their later years healthy, and wish to achieve great accomplishments in their lives. To achieve that, rather than considering an aging population as a negative social phenomenon, we should create a society where elderly people can enjoy a healthy, prosperous life through social participation and contribution. Factors that hamper the elderly from leading a healthy life include various psychological and social problems occurring in older age, as well as a high incidence of diseases. Therefore, gerontology, which focuses on health promotion of the elderly by encompassing the study of social welfare, psychology, environment and social systems; and geriatrics, which focuses on health care of elderly people and carried out research, education and practices to promote health in the elderly, are becoming more important. Furthermore, along with a need for multidisciplinary care to support geriatric medicine, the development of a comprehensive education system for aged‐care professionals is awaited. Thus, we should now recognize the importance of gerontology and geriatrics, and a reform of medical‐care services should be made in order to cope with the coming aged society. Population aging is a global phenomenon. The actions being taken by Japan, the world's most aged society, have been closely watched by the rest of the world. Japan's aged society has been posing not only medical, nursing and welfare problems, but also complex problems closely associated with economy, industry and culture. Therefore, to solve these problems, a macroscopic integration and cooperation among industries, education institutions, administration and community through an interdisciplinary approach including medical science, nursing science, nursing care, study of social welfare, social science, engineering, psychology, economics, religion and ethics should be made. Regarding the promotion of gerontology, the “Committee for Establishing a Scientific Community for Sustainable Aged Society” of the Science Council of Japan also prepared a proposal and this was announced on 20 April 2011. 2. Current situation and problems  (1) Promotion of social participation and contribution of elderly people In Japan, the overall labor force rate is expected to decrease in the near future as a result of the low birth rate and high life expectancy. In contrast,...

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Objective: The purpose of this pilot study was to examine the effects of an intervention of the horticultural activities program in elderly people with mild to moderate dementia. Methods: The study design was a before-after study. The subjects were 11 elderly people with dementia. The horticultural activities program was developed to support mental, behavioral, social, and cognitive aspects of well-being in elderly patients. The program was conducted once a week for a total of six weeks. Vitality Index (VI) and Mini-Mental State Examination (MMSE) were used to determine the effects of the horticultural activities program. Results:The results showed that VI and MMSE scores significantly improved immediately after intervention compared with those at baseline. In addition, the scores significantly decreased after 1 month of intervention compared with those immediately after the intervention. Conclusion: In this study, VI and MMSE scores of elderly people with mild to moderate dementia improved after participation in the horticultural activities program. However, as the number of subjects was small in the present study, further studies are required to fully elucidate the effects of a horticultural activities program.