いっとさんけん 一都三県 LinksSentence search for 一都三県Sentence search for いっとさんけんSentence search for 1都3県Kanji details for 一, 都, 三 and 県Edit in JMdict Noun1. one metropolis and three prefectures (i.e. the Tokyo area: Tokyo, Kanagawa, Chiba and Saitama)Other forms1都3県 【いっとさんけん】 Discussions Log in to talk about this word.