ごぶんいち 五分の一 LinksSentence search for 五分の一Sentence search for ごぶんのいちSentence search for ５分の１Kanji details for 五, 分 and 一Edit in JMdict Expressions (phrases, clauses, etc.), Noun1. one fifth partOther forms５分の１ 【ごぶんのいち】 Discussions Log in to talk about this word.