In 398, according to the Samguk sagi, he constructed Ssanghyeon Castle to protect Baekje's remaining territory north of the Han River.
In 399, during another round of conscription for the battles against Goguryeo, many peasants are said to have fled to Silla.
Historical records do not show any contacts with China during Asin's rule.
Asin died during the year 405, and watched desperately as his once-powerful kingdom was falling slowly to its powerful northern neighbor Goguryeo.
His three brothers would fight for the throne ending in all of their deaths and the crowning of Asin's son.