かい 甲斐がある LinksSentence search for 甲斐があるSentence search for かいがあるSentence search for 甲斐が有るKanji details for 甲 and 斐Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending (irregular verb)1. to be effective; to be fruitful; to be worthwhile; to be worth; to be rewarded; to pay offOther forms甲斐が有る 【かいがある】 Discussions Log in to talk about this word.