一いち分ぶん野や

noun

one field; a branch; a division

Used to refer to a single area of activity, study, or specialization. Often appears in contexts like 一分野として (as one field) or 一分野を担う (to be responsible for one area).

• 彼かれは医い学がくの一いち分ぶん野やとして遺い伝でん子し研けん究きゅうを選えらんだ。

  He chose genetic research as one field of medicine.

• この会かい社しゃは物ぶつ流りゅうの一いち分ぶん野やを専せん門もんにしている。

  This company specializes in one branch of logistics.