The northern part of a region; the north side of an area (e.g., city, prefecture).
市の北部には工場が多い。
There are many factories in the northern part of the city.
この県の北部は冬に雪が深くなる。
The northern part of this prefecture gets heavy snow in winter.
北部地域の交通アクセスを改善する計画がある。
There is a plan to improve transportation access in the northern region.