A somewhat formal or written term for a father, often used in contrast with 女親 (mother). In everyday speech, 父親 (ちちおや) or お父さん are more common.
See also: 女親
男親としての責任を果たす。
Fulfill one's responsibilities as a father.
この書類には男親の署名が必要です。
This document requires the signature of the male parent.
Compound of 男 (おとこ, 'man') and 親 (おや, 'parent'). The exact historical derivation is uncertain, but the word follows a common pattern of specifying the gender of a parent.