岩いわ代しろいわしろFreq.FrequencyTop 100,000じ字FuriganaAudioMeanings1nounIwashiro Provincehistorical termHistorical province in the western part of present-day Fukushima Prefecture, part of the old Mutsu Province before the Meiji era.岩代国いわしろのくには明めい治じ時じ代だいの初はじめに陸奥国むつのくにから分ぶん割かつされた。Break this sentence down in the analyzerIwashiro Province was separated from Mutsu Province at the beginning of the Meiji era.