[Japan faces up to demographic aging].
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D017677:Age Distribution; D000367:Age Factors; D001208:Asia; D003710:Demography; D019049:Developed Countries; D003906:Developing Countries; D005202:Asia, Eastern; D007564:Japan; D011153:Population; D011154:Population Characteristics; D011157:Population Dynamics; D012106:Research
Age Distribution--changes; Age Factors; Asia; Comparative Studies; Demographic Aging; Demographic Factors; Developed Countries; Developing Countries; Eastern Asia; Japan; Population; Population Characteristics; Population Dynamics; Research Methodology; Studies