部門(ぶもん)division (of a larger group), branch, field, class (subclass), group, category, department

私(わたし)たちの学校(がっこう)は合唱(がっしょう)の部門(ぶもん)で優勝(ゆうしょう)しました。

Our school won the championship in the choir division. {division (of a larger group), branch, field, class (subclass), group, category, department}

僕(ぼく)は、この会社(かいしゃ)の営業(えいぎょう)の部門(ぶもん)で働(はたら)いています。

I am working in the sales department of this company. {division (of a larger group), branch, field, class (subclass), group, category, department}

売上(うりあげ)を増(ふ)やすために、販売(はんばい)の部門(ぶもん)を拡充(かくじゅう)するつもりだ。

In order to increase sales, we plan to expand the sales department. {division (of a larger group), branch, field, class (subclass), group, category, department}

アカデミー賞(しょう)で四(よん)部門(ぶもん)に輝(かがや)いて以来(いらい)、俳優(はいゆう)の仕事(しごと)が途切(とぎ)れません。

Since shining in four categories at the Academy Awards, the actor's work has not stopped. {division (of a larger group), branch, field, class (subclass), group, category, department}

生物(せいぶつ)学(がく)の一(いち)部門(ぶもん)である免疫(めんえき)の勉強(べんきょう)は中学生(ちゅうがくせい)には難(むずか)しいのではないだろうか。

Studying immunology, which is a branch of biology, might be difficult for middle school students, wouldn't it? {division (of a larger group), branch, field, class (subclass), group, category, department}