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[[Chinese people|Chinese]] immigrants who naturalized in ancient Japan were called "Torai-Jin" (渡来人). They introduced many aspects of [[Chinese culture]] to Japan; valuing their knowledge and culture, the Yamato government gave preferential treatment to Torai-Jins.
===KoreanChinese migration===
The archeological record and ancient Chinese sources indicate that the various tribes and chiefdoms of Japan did not begin to coalesce into states until 300, when large tombs begin to appear while there were no contacts between the Wa and China. Some describe the "mysterious century" as a time of internecine warfare as various chiefdoms competed for hegemony on Kyushu and Honshu.<ref>{{cite book| url=http://books.google.com/books?ie=UTF-8&vid=ISBN0824820304&id=dCNioYQ1HfsC&pg=PA7&lpg=PA7&dq=kofun+tumuli+korea&vq=korea+kofun&sig=YUcKBcOAukHzM-pfzp-uUTug8GY| title=Sacred Texts and Buried Treasures: Issues on the Historical Archaeology of Ancient Japan| first=William Wayne| last=Farris| id=ISBN 0-8248-2030-4| publisher=University of Hawaii Press| pages=7}}</ref>
Many important figures were also immigrants from [[China]]. Chinese immigrants also had considerable influence according to the Shinsen-Joujouroku (新撰姓氏録),<ref>{{cite web| url=http://homepage1.nifty.com/k-kitagawa/data/shoji.html| title=『新撰姓氏録』氏族一覧| accessdate=2006-05-31}}</ref> which was used as a directory of aristocrats. Yamato Imperial Court had officially edited the directory in 815, and 163 Chinese clans were registered.
A unified [[Yamato Province|Yamato]] state may have coincided with large migration of Korea's [[Baekje]] people at the end of the fourth century. [http://books.google.com/books?vid=ISBN0521223547&id=tZCsr49JQJgC&pg=PA455&lpg=PA455&dq=egami+horse-rider+theory&sig=2iBmNrCBe90AopTlP1tpKE6CPp4].
According to [[Nihongi]], The [[Hata clan]] ([[:ja:秦氏|秦氏]]), which was composed of descendants of [[Qin Shi Huang]]<ref>{{cite web| url=http://www.myj7000.jp-biz.net/clan/03/03001.htm| title=日本の苗字7000傑 姓氏類別大観 秦 氏【１】| accessdate=2006-05-31}}</ref> arrived at Yamato in 403 (the fourteenth year of Oujin) leading the people of 120 provinces. According to the Shinsen-Shoujiroku, the Hata Clan were dispersed in various provinces during the reign of [[Emperor Nintoku]] and let undertake sericulture and the manufacturing of silk for the court. When the [[finance ministry]] was set up in Yamato Court, Hata Otsuchichi (''秦大津父'') was in charge of accounts as a minister of it.
In 409 (twentieth year of Oujin), [[Achi-no-Omi]] ancestor of the [[Yamato-Aya clan]] which was composed of also arrived with the people of 17 districts. According to the Shinsen-Shoujiroku, Achi obtained the permission to establish the Province of Imaki. The Kawachino-Fumi clan , descendants of [[Gaozu of Han]], introduced aspects of Chinese writing to the Yamato court.
Japan of the Kofun period was very positive towards the introduction of Korean and Chinese culture. [http://books.google.com/books?vid=ISBN0824818520&id=HpgcaKpnuU0C&pg=PA224&lpg=PA224&dq=kofun+korea&sig=MmzEJQoxe4IhzXF84FJdghFxG8E]. Korean immigrants played an important role in introducing [[Chinese civilization]] to early Japan.[http://books.google.com/books?vid=ISBN0395652375&id=MziRd4ddZz4C&pg=PA56&lpg=PA56&dq=Kofun+%22chinese+civilization%22&sig=TydOlwxfqIlQOnvU-zdOE0IXHoQ]. Not only are there many material objects from China and Korea that were exported to Japan such as bronze mirrors, iron, and pottery. [[Ceramic]] manufacturing in [[kiln]]s and horse-riding are two important technologies transmitted to Japan by Korean immigrants.<ref>{{cite book| url=http://books.google.com/books?ie=UTF-8&vid=ISBN0824818520&id=HpgcaKpnuU0C&pg=PA224&lpg=PA224&dq=korea+kofun&sig=MmzEJQoxe4IhzXF84FJdghFxG8E| title=Prehistoric Japan: New Perspectives on Insular East Asia| first=Keiji| last= Imamura| pages=224| id=ISBN 0-8248-1852-0| publisher=University of Hawaii Press}}</ref>
One of the Baekje kings sent ambassadors to give the [[Seven-Branched Sword]] (七支刀 ''shichishitō''), an iron sword with seven blades extending from the main branch, to a Japanese ruler.
[[Image:IshibutaiWithFigureSmallVersion2.jpg|thumb|150px|A late kofun, earthen covering gone.]]
Iron working technology was introduced into Japan from Korea around 300. Korea was an important source of iron ingots to Japan and the Koreans were famous for the iron-working skills in that time period.<ref name="Beasley">{{cite book| url=http://books.google.com/books?ie=UTF-8&vid=ISBN0520225600&id=9AivK7yMICgC&pg=PA11&lpg=PA11&dq=history+of+japan+and+korea&vq=korea&sig=zyBfJ-O5lI6sDs2H4CK7uTuMGig| title=The Japanese Experience: A Short History of Japan| first=W. G.| last=Beasley| publisher=University of California Press| year=Aug 31, 2000| id=ISBN 0-520-22560-0}}</ref> Korean paintings in [[Goguryeo]] tombs had important influences in Japan.<ref>{{cite web| url=http://whc.unesco.org/en/list/1091| title= Complex of Koguryo Tombs| publisher=UNESCO World Heritage Centre| accessdate=2006-05-31}}</ref> Decorated tombs and painted tumuli which date from the fifth century and later found in Japan are generally accepted as Korean exports to Japan. The [[Takamatsuzuka Tomb]] even has paintings of woman dressed in distinctive Korean pleated skirts.<ref>{{cite book| url=http://books.google.com/books?ie=UTF-8&vid=ISBN0824820304&id=dCNioYQ1HfsC&dq=kofun+tumuli+korea&lpg=PA95&pg=PA95&sig=pklpAbfrrspwFUtncGBqMy1dks0| title=Sacred Texts and Buried Treasures: Issues on the Historical Archaeology of Ancient Japan| pages=95}}</ref>
Yamato links to the mainland and the Liu Sung Dynasty in 425 and 478 were facilitated by the maritime knowledge and diplomatic connections of Baekje.<ref name="Beasley"/>
===Chinese migration===
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