noun-modifying (irregular)
quinquennial; recurring every five years
Used as a prenominal modifier in formal or administrative contexts, such as government plans or reports. Often appears in phrases like 五箇年計画 (five-year plan).
The government announced a new five-year plan.
A large-scale survey is conducted every five years.
Standard kanji spelling using 箇 as the counter.
Common variant using katakana カ for the counter.
Variant using small katakana ヵ.
Variant using small katakana ヶ.
Variant using hiragana か for the counter.
Variant using full-width katakana ケ.
Variant using numeral ５ instead of 五.
Numeral variant with katakana カ.
Numeral variant with small katakana ヵ.
Numeral variant with small katakana ヶ.
Numeral variant with hiragana か.
Numeral variant with full-width katakana ケ.
Compound of 五 (five) + counter 箇年 (years, using the counter 箇/カ/ヶ). The counter 箇 is a variant of 個, used in formal counting. The reading ごかねん is standard.