Production and Fabrication method of Bronze Implements in the Term when Keyhole-shaped mounded tomb appeared

在日本群岛，高芬时期的墓葬中埋葬着各种青铜器。首先，在本研究中，古墓发掘的各种青铜器清楚地展示了它是由什么样的技术制造的。即使是同一时期的青铜器，它的制作方法也有共同之处，但也有不同之处。此外，从设计上的差异来看，科芬时期的青铜器存在着不同的社会角色。

In the Japanese Islands, various bronze implement was buried in the grave in the Kofun period. First,in this research, various kinds of various bronze implement of the ancient tomb excavation showed clearly by what kind of technology it is manufactured. And even if it was the bronze implement of the same time, it checked that there were not only a common feature but various differences in the fabrication method.Furthermore, from there being a difference in a design ,It is thought that there were various social roles in the bronze implement in Kofun period.