四よんか年ねん

noun-modifying (irregular)

quadrennial; recurring every four years

Used as a prenominal modifier for events, plans, or periods that occur or span four years. Common in official contexts like 四か年計画 (four-year plan).

• 市しは新あたらしい四よんか年ねん計けい画かくを発はっ表ぴょうした。

  The city announced a new four-year plan.

• この四よんか年ねん契けい約やくは来らい月げつで切きれる。

  This four-year contract expires next month.