A double-faced set of molds for making bronze weapons called "wide-shaped bronze halberds" of the Yayoi period was found at the ruins of Fukuoka City.
According to the city, it is the first time in Japan that both sides have been found as a set.
According to Fukuoka City, in May of last year, during an excavation survey at the Takahata Ruins in the city, both sides of a mold for making a bronze weapon called a "wide bronze dagger" were found at the place where Yayoi pottery was discarded. Found.
The two molds are believed to be from the first half of the late Yayoi period, around the 1st century to the 2nd century AD, and are made of a stone called 'quartz feldspar porphyry'. It is approximately 15 cm thick.
They weigh approximately 19 kg and 14 kg, respectively, and are made by pouring hot bronze into two molds to create a "wide copper dagger".
According to the person in charge of cultural properties in Fukuoka City, it is the first time in Japan that both the front and back of the mold have been found as a set. It is an important discovery when considering the production of bronze weapons in Japan."