noun
specialized subject; special subject
Refers to a subject or course of study that is part of one's major or area of specialization, typically in a university context.
大学では専門科目の授業が週に三回あります。
At university, I have specialized subject classes three times a week.
彼は専門科目の試験に合格した。
He passed the exam for his specialized subject.
Compound of 専門 (せんもん, 'specialty') and 科目 (かもく, 'subject').