The age profile for the year 2025 shows a vicissitude of age structure which is top-heavy and characterized by two salient bulges, one in the middle and the other in the old ages. Here, population ageing is coming to its climax.

The last age profile for the year 2050 represents a more rectangular shape though it still has an accordion-like vestige of echo effects of past baby booms and baby busts. The last one might draw a contour line pretty

Figure 1. Age Profile of the Population of Japan :1920

Source Statistical Bureau, Office of the Prime Minister. Population Census, 1920.

Figure 2. Age Profile of the　Population of Japan :1994

Source Institute of Population Problems,Ministry of Health and Welfare.Jinko Tokei Shirvoshu 1995 (Latest Demographic Statistics 1995.)

Figure 3. Age Profile of the　Population of Japan :2025

Source Institute of Population Problems,Ministry of Health and Welfare.Nihon no Shorai Suikei Jinko, 1992.

Figure 4. Age Profile of the　Population of Japan :2050

Source :See Figure 3.

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