工事

1. Origins, structure, and basic meaning

• Structure: 工事(こうじ) is a noun for construction or repair work on roads, buildings, and similar structures.
• Basic usage: It includes work on existing structures, such as 修理工事 on a roof, as well as new construction.

2. Common pitfalls and similar expressions

• Scope of the work
  • 作業 broadly refers to carrying out work, while 工事 centers on construction, installation, or repairs involving facilities.
• A similar-sounding place name
  • 工事(こうじ) is the work of construction, whereas 工場(こうじょう) is a factory where things are made.
  • Distinguish the endings じ and じょう: じょう combines a yōon spelling with a long vowel.