The East Asian situation and Koguryo's diplomacy toward Wa from the end of 6^<th> century to the mid-7^<th> century.

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This study is associated about diplomacy of Koguryo(高句麗) to Wa(倭) with a trend of Sui(隋), Tang(唐), Silla(新羅), Baeje(百済) and Wa at the beginning of 7th century from the end of 6th century that analyzed it generally and examined the significance.Opposition with Koguryo and Sui, Tang has been regarded as Koguryo diplomatic direct cause to Wa, until now. However, as a result of study, it was revealed that the diplomacy of Koguryo to Wa associated with the Koguryo policy in the Korean Peninsula to Silla deeply.