noun
low birth rate; few children per family
Refers to a demographic trend of having fewer children. Often used in discussions of societal aging and population decline. Compare with 少子化 (declining birth rate).
See also: 少子化
少子高齢化が進んでいる。
The population is aging and the birth rate is declining.
少子対策として、育児支援が拡充された。
Childcare support was expanded as a measure against the low birth rate.
noun
Rare standalone use; more commonly encountered in compound words like 末っ子 or 末子. When used alone, it may be ambiguous without context.
彼は三人兄弟の少子だ。
He is the youngest of three siblings.