Title: Tetsusei buki no ryūtsū to shoki kokka keisei
Subjects: History, Ironwork, Iron industry and trade, Ancient Weapons, Antiquities, Yayoi culture, Yayoishiki bunka, Nihon-Rekishi-Yamato jidai, Tekki, Buki-Rekishi
Places: Japan
Time periods: To 645, To 1500