乐浪郡
The Hata are said to have come to Japan from China through the Chinese Lelang Commandery, then through the Kingdom of Baekje (both on the Korean peninsula). Lelang, near what is today Pyongyang, was the greatest of the Four Commanderies of Han created in 108 BC in the areas captured after the conquest of the Wiman Joseon state (194 BC – 108 BC), which corresponds to the current North Korea, by Emperor Wu of the Chinese Han dynasty. A flux of Chinese immigration into the Korean peninsula continued without cessation, implanting Chinese culture and technology there. Some scholars say the Hata clan did not come from Baekje, but from the Silla or Gaya area.