行政区

1. Origins, structure, and basic meaning

• Structure: 行政区(ぎょうせいく) means an administrative district established for governmental purposes.
• Basic usage: It is used when dividing a city into administrative areas or describing districts that border each other. Typical patterns are 市を行政区に分ける and 二つの行政区が接する.

2. Common pitfalls and similar expressions

• Remember that it is an official division
  • It denotes an area established for administration, not merely a neighborhood known by an everyday name.
• Difference from 地区
  • 地区(ちく) broadly means a particular area, while 行政区 clearly indicates a district defined for administrative purposes.