Where did Hatas come from? And who were they?

I visited one temple and two shrines in Uzumasa, one of the western areas in Kyoto, today. The Koryu-ji Temple, which belongs to the Shingon sect, was founded in 603 and is the oldest one in Kyoto. Its founder, Hata no Kawakatsu, was a Chinese-Japanese and brought advanced technologies at the time, such as weaving and brewing, to Japan. Uzumasa's "masa," Hata, and, interestingly enough, Chinese Qin Dynasty's "Qin" share the same Chinese character. The two shrines I visited are Osake-jinja Shrine and Konoshima-ni-masu-Amateru-mitama-jinja Shrine. Osake-jinja Shrine is dedicated to Qin Shi Huang ( literally; the First Emperor in China, 259 BC-210 BC). The emperor's 14th-generation descendant is said to have escaped from wars in China, and founded the shrine. Konoshima-ni-masu-Amateru-mitama-jinja Shrine (commonly known as Kaiko-no-yashiro) was first recorded on a public document in 701, and is supposed to have been founded earlier. It has Kokai-jinja Shrine in it, which enshrines silkworms. Sericulture is supposed to have been brought to Japan by Hata clan.