日本东京大学精神科教授原田宪一,被上海第二医科大学聘为顾问教授,并于1989年10月11日在上海市精神卫生中心作了二个学术报告,其中之一为书面报告,现择其要点作一介绍。近年来,日本人的平均寿命延长,痴呆病人数也增多,在65岁以上的人口中占4.5～5.5%,其中半数是中度以上的痴呆。而相应的是日本出生人口数在减少,因此今后老龄人口增 Professor Harada Harada, Professor of Psychiatry at the University of Tokyo, Japan, was appointed as a consultant professor by the Shanghai Second Medical University and made two academic reports at the Shanghai Mental Health Center on October 11, 1989. One of them was a written report. Select the main points for an introduction. In recent years, the average life expectancy of the Japanese has been extended, and the number of dementia patients has also increased. It accounts for 4.5 to 5.5% of the population aged over 65, and half of them are moderate to dementia. Correspondingly, the number of people born in Japan is decreasing, so the elderly population will increase in the future.