noun-modifying (irregular)
octennial; recurring every eight years
Used as a prenominal modifier (adj-f) in formal or statistical contexts, such as government plans or reports. Describes events, plans, or periods that span or repeat every eight years.
八カ年計画の最終年度に入った。
We have entered the final year of the eight-year plan.
この八カ年調査の結果を報告する。
We report the results of this octennial survey.
Variant with katakana ケ, rare.
Arabic numeral with small ヶ.
Arabic numeral with katakana ヵ.
Arabic numeral with kana か.
Arabic numeral with katakana ケ.
Compound of 八 (eight) + カ年 (counter for years). The カ is a counter marker derived from 箇, and 年 means 'year'. The form is used in formal or bureaucratic contexts.