A'st1 was a 6-member boyband consisting of Park Jung Jin (leader), Azuma Tomoki (Tomo), Sung In Kyu, Ding Hai Ming, Byun Jang Moon, and Lim Han Byul. The group was made up of four Korean members (Jung Jin, In Kyu, Jang Moon, and Han Byul), one Japanese member (Tomo), and one Chinese member (Hai Ming). As of November 28, 2009, the group was disbanded. Former member Lim Han Byul, is currently a member of the ballad group Monday Kiz.
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