磐いわ城きいわきFreq.FrequencyTop 100,000Meanings1nounIwaki (historical province)historical termHistorical province name; now part of Fukushima and Miyagi prefectures. Used in historical contexts.磐いわ城き国こくは明めい治じ時じ代だいに設せっ置ちされた旧きゅう国こく名めいの一ひとつです。Iwaki Province is one of the old provinces established in the Meiji period.