Refers to the central or main office of an organization, such as a company, government agency, or broadcasting station.
We are waiting for instructions from the main office.
this office; our office
Used by a branch or affiliated office to refer to its own main office, or by the main office itself when speaking of itself. Often used in internal communications.
Our office is currently considering this matter.
this game; the current game
Used in the context of board games like go or shogi to refer to the game currently being played or discussed. Often appears in commentary or match reports.
This game has reached a very difficult position.
本局 is the main headquarters office, while 支局 is a branch office subordinate to it.
general post office
Compound of 本 (ほん, 'main') and 局 (きょく, 'office' or 'bureau'). The reading is the standard on'yomi combination.