These are artifacts unearthed from the ruins of a mountain castle from the Sengoku period that fell. (Two lead bullets for a matchlock gun) These bullets deformed upon impact with their target after being fired from a matchlock gun. They are valuable items that were actually fired in battle. (Fragment of Song Dynasty coins) This is a fragment of several Song Dynasty coins that fused together due to a fire. Four coins fused together and split in half. (One iron nail) This is an iron nail from the Sengoku period that was used in a building. It is an artifact from a building that was in the mountain castle. The lead bullets are approximately 2 centimeters in diameter.