硬こう質しつ陶とう器きMeaningsNoun1. ironstone chinaKanji used硬hard like a rock質quality陶pottery器instrumentPitch accentこうしつとうきComposed of硬こう質しつhardness; stiffnessNoun陶とう器きpottery; earthenware; ceramics; (soft-paste) porcelain; chinaNoun