Aju

Aju was an old district near Asan Bay on Korea's western coast. Under Koryŏ it first depended on Ch'ŏnan before gaining its own magistrate and the name Aju. In 1413 the Joseon court renamed it Asan during a wider reform of local names. Granaries around Asan Bay formed part of the system that collected tax grain for transport by sea to the capital.