Aging of the population—the process or phenomenon in which the average age rises and the proportion of elderly people increases.
日本は世界でも早くから高齢化が進んだ国の一つだ。
Japan is one of the countries where population aging has progressed early among the world.
高齢化に伴い医療や介護の需要が増えている。
With aging, demand for medical care and nursing care is increasing.
地方都市では若者の流出で高齢化が顕著だ。
In regional cities, aging is noticeable due to the outflow of young people.