noun which may take the genitive case particle 'no', noun
unmarried by choice; non-marriage
Refers to a deliberate decision not to marry, as opposed to simply being not yet married (未婚). Often used in social or demographic contexts.
See also: 未婚
非婚のカップルが増えている。
The number of unmarried couples (by choice) is increasing.
彼女は非婚を選んだ。
She chose not to marry.