How to say "division" in Japanese

• 部ぶJLPT N1approx.Common
  noun, noun (suffix)A division in the organizational sense: a department or bureau within a company, institution, or similar body, as in a firm's sales division or a university faculty.
  新しんサービスの料金りょうきん設定せっていはマーケティング部ぶが行おこなう。↗

  The marketing department is responsible for pricing new service.
• 部門ぶもんJLPT N1approx.Common
  no-adjectiveA division of a larger group — a branch or sector within a bigger whole. Broader than 部, it also covers a field or class of activity, as in a research division.
  歴史学れきしがくは人文じんぶん科学かがくの一部いちぶ門もんである。↗

  History is a branch of the humanities.
• 分割ぶんかつCommon
  noun, suru verb, transitive verbThe act of dividing something into parts: partitioning land, splitting a payment into installments, segmenting data. It names the splitting itself, not the arithmetic operation of division.
  クラスが大おおきすぎるので二ふたつのより小ちいさなグループに分割ぶんかつした。↗

  The class was too big so we split up into two smaller groups.
• 区画くかくJLPT N1approx.Common
  noun, suru verb, transitive verbA division of physical space: a marked-off section, compartment, or block, such as a plot of land or a parking bay. It points to the bounded area itself rather than the act of dividing.
  彼女かのじょはここから数すう区画くかく離はなれた所ところに住すんでいる。↗

  She lives a few blocks away from here.
• 区分くぶんJLPT N2approx.Common
  noun, suru verb, transitive verbDivision as classification or demarcation: sorting things into categories or marking where one section ends and another begins, as in classifying documents or dividing up responsibilities.
  土地とちは８つに区分くぶんされた。↗

  The land was divided into 8 lots.

For organizational divisions use 部 (a department) or 部門 (a branch or sector of a larger group); use 分割 for the act of splitting something, 区画 for a physical section or block, and 区分 for classification or demarcation.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 部ぶdepartment (in an organization, company, etc.)
• 部門ぶもんdivision (of a larger group)
• 分割ぶんかつpartition
• 区画くかくdivision
• 区分くぶんdivision
• 分けわけdivision
• 分配ぶんぱいdivision
• 割り算わりざんdivision
• 分裂ぶんれつsplit
• 仕切りしきりpartition
• 目盛りめもりgraduations (on a ruler, thermometer, etc.)
• 採決さいけつvote
• 区分けくわけdivision
• 分野ぶんやfield
• 分別ぶんべつseparation (e.g. of rubbish when recycling)
• ディビジョンdivision
• 除法じょほうdivision
• 除算じょさんdivision
• 事業部じぎょうぶdivision (of company)
• 分周ぶんしゅうdivision
• 分置ぶんちdivision (of an organization)
• 除じょdivision
• 分け取りわけどりsharing
• 区処くしょdividing for administrative purposes
• 師団しだん(army) division
• 分隊ぶんたいsquad
• 門もんphylum
• 課かsection (in an organization)
• 部会ぶかいdivision (of a larger organisation)
• 線せんdivision
• めgraduation
• 界かいborder