Gogugyang (died 391, r. 384–391)[1] was the 18th ruler of Goguryeo, the northernmost of the Three Kingdoms of Korea.
During his reign, the balance of power among the Three Kingdoms began to shift, as Goguryeo attacked Baekje, and allied with Silla.
In the second year of his reign, Gogukyang sent 40,000 troops to attack the Chinese state of Later Yan in the Liaodong Peninsula.
In 386, the prince Go Dam-deok, the later King Gwanggaeto the Great, was designated heir to the throne.
[3] He furthered the formal state adoption of Confucianism and Buddhism, building a national temple and repairing the ancestral shrine.