河川工事

• Reading: かせんこうじ
• Romaji: kasenkouji
• Kanji breakdown: 河 (ka) — river; 川 (sen) — river; 工 (kou) — construction, craft; 事 (ji) — affair, matter
• Pronunciation: /ka.seɴ.koː.dʑi/

Meaning

River construction work; riparian works. Engineering projects to maintain, repair, or improve river infrastructure.

A compound noun referring to construction work carried out on or alongside rivers — including embankment reinforcement, dredging, flood prevention infrastructure, and channel widening. Very common in Japan, where river management is a major public works category due to frequent typhoons and heavy rains. Often encountered on road signs and in local news about temporary road closures.

Examples

1. 台風の被害を受けて、河川工事が始まった。 River construction work began after the typhoon damage.
2. 河川工事のため、この道は来月まで通行止めです。 This road is closed until next month due to river construction work.
3. 大規模な河川工事で地域の安全性が向上した。 Large-scale river construction work improved safety in the area.

Usage Guide

Context: infrastructure, signage, local news

Tone: official

Origin & History

Compound of 河川 (kasen, rivers) + 工事 (kouji, construction work). Literally 'river construction' — engineering work related to river infrastructure.

Cultural Context

Era: Modern

Generation: All ages

Social background: Universal