noun
trend toward staying unmarried; declining marriage rate
Sociological term describing a societal shift where more people remain unmarried, often contrasted with 晩婚化 (trend toward later marriage).
See also: 晩婚化
日本では未婚化が進んでいる。
In Japan, the trend toward staying unmarried is advancing.
未婚化の背景には経済的な理由がある。
Economic reasons lie behind the declining marriage rate.