平ひら山さん城じょうMeaningsNoun1. castle on a hill in the plains; flatland-mountain castleOther readings平ひら山やま城じろKanji used平flat山mountain城castleComposed of平ひらsomething broad and flat; common; ordinary; plain; rank-and-file; low-ranking employee; freshman; novice; privateNoun山さん城じょうmountain castleNoun