本部|ほんぶhonbu[1]atamadaka (head-high)

1. nounheadquarters; head office; main office
   大学だいがく本部ほんぶはニューヨークに分校ぶんこうを設立せつりつすることを決定けっていした。↗

   The University Administration decided to set up a branch campus in New York.

• Synonym本拠ほんきょNeutralA base or stronghold, often in the form 「本拠地」; used mostly for sports teams and in military contexts.
• Synonym本社ほんしゃNeutralA company's head office (「東京本社」); also the main shrine. 「本部」 is the central body of any organization, not just companies.
• Synonym本省ほんしょうNeutralThe head office of a central government ministry, as opposed to its outposted agencies; used mainly in government offices.
• Synonym本局ほんきょくNeutralThe main office of an institution named with 「局」, such as a post office or TV station; also means the bureau itself.
• Synonym本店ほんてんNeutralA store's main branch (「本店限定」); used for shops and banks. 「本部」 is not limited to stores.
• SynonymヘッドクォーターNeutralA loanword for headquarters, heard mainly at foreign-affiliated firms; rare in everyday speech, where 「本部」 is the usual choice.
• Related本署ほんしょNeutralThe main police or fire station that oversees branch stations; can also mean the station itself. Used in police and similar organizations.
• Related中央局WrittenWritten/formal prose for a central government office; rarely seen in everyday use. 「本部」 serves as the hub of any kind of organization.
• Antonym支部しぶNeutralA branch or subdivision run under a 「本部」; the two stand in opposition.
• Antonym支局しきょくNeutralA branch office of a newspaper or TV station, standing opposite the 「本部」 that governs it.
• Antonym出先でさきNeutralA dispatched or branch office, or the place someone has gone out to; opposed to 「本部」.

Use 「本部」 for the central hub of any organization, as in 「対策本部」 or 「警視庁本部」. For a company's head office say 「本社」, for a store's main branch 「本店」, and for a team's home base 「本拠」. 「支部」 and 「支局」 are the branches a 「本部」 oversees.

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

1. 何なんかの中心ちゅうしんとなる部分ぶぶん。
2. 組織そしきにおいて中心ちゅうしんとなる部署ぶしょ、部局ぶきょく。