乐浪郡
According to Japanese historian Tadashi Nishitani, the Yoshinogari site, an archeological site in Kyushu dating from the late Yayoi period, appears virtually identical to villages in the Korean peninsula of the same period. By contrast, the burial mounds at Yoshinogari show signs of influence from the Chinese Lelang Commandery. During this period Japan imported great numbers of peninsular mirrors and daggers, which were the symbols of power in Korea. Combined with the curved jewel known as the magatama, Korea's "three treasures" soon became as prized by Japan's elites as Korea's, and in Japan they later became the Imperial Regalia.