aging society; ageing society
高齢化社会への対策が急務だ。
Measures for an aging society are urgently needed.
日本は高齢化社会の先進国だ。
Japan is a leading country in terms of aging society.
高齢化社会では介護の担い手不足が深刻だ。
In an aging society, the shortage of care workers is severe.