King Asin of Baekje (?-405, r. 392-405) was the 17th king of the ancient Korean kingdom of Baekje, one of the Three Kingdoms of Korea. He was the son of King Chimnyu, and ascended to the throne after the death of Chimnyu’s brother, King Jinsa.
During his reign, Goguryeo forces under King Gwanggaeto steadily pushed into Baekje from the north. King Asin appointed his maternal uncle Jin Mu as chief general and ordered him to attack Goguryeo repeatedly in the early 390s, but each attack was defeated.
King Asin sought to strengthen Baekje’s position against Goguryeo, sending his son Jeonji to the Wa kingdom of Japan as a hostage to cement Baekje’s alliance with that country in 397. In 398, according to the Samguk Sagi, he constructed Ssanghyeon Castle to protect Baekje’s remaining territory north of the Han River. In 403 he allied with Silla against Goguryeo. Historical records do not show any contacts with China during King Asin's rule.
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