noun
treated as a daughter; adopted daughter figure
Refers to a girl or woman who is treated like one's own daughter, often in a non-biological, familial or mentor-like relationship. Can also describe the act of treating someone as a daughter.
彼女は師匠の娘分として大切に育てられた。
She was raised with great care as her master's daughter figure.
あの子は私にとって娘分のような存在だ。
That child is like a daughter to me.
noun
geisha house manager (Edo period)
Archaic term for a woman who managed geisha in the Edo period. Not used in modern Japanese.
江戸時代の遊郭では、娘分が芸者たちの世話をしていた。
In the pleasure quarters of the Edo period, the 'musumebun' took care of the geisha.