noun
ward; borough; city district
An administrative division of a city, especially the 23 special wards of Tokyo (特別区). Also used for wards in other designated cities.
東京には23の区があります。
Tokyo has 23 wards.
私は新宿区に住んでいます。
I live in Shinjuku Ward.
noun
A defined area for a specific purpose, such as an electoral district (選挙区) or postal zone (郵便区). Often used in compounds.
See also: 郵便区
この選挙区は候補者が多い。
There are many candidates in this electoral district.
郵便区番号を確認してください。
Please check the postal zone number.
The kanji 区 originally depicted a container with a divider, conveying the idea of a partitioned area. The reading く is the on'yomi.