プログレッシブ和英中辞典(第4版)の解説
ぶんや【分野】
a field; a sphere; a realm
彼女は女性の活動に新分野を開いた
She opened up a new field [sphere] of activity to women.
数学の諸分野
various branches of mathematics
彼は彫刻の分野では第一人者だ
He is second to none in the world of sculpture.
それは私の専門分野ではない
It's not in my line [field].／That's out of my line [field].／《口》 That's not my department.
国会内の勢力分野に異動があった
There were some changes in 「the power structure of [the political balance of power in] the Diet.