Geonyong Lee, the composer of Mass for AILM, is a well-known composer in Asia whose main interest lies in choral music. He has composed numerous choral works which are highly diverse in their nature. This study introduces the choral composer Geonyong Lee to the West. The significance of Geonyong Lee's Mass for AILM is the display of Asian inflection in a traditional setting of the mass ordinary. Lee's Mass for AILM employs melodic and rhythmic aspects of traditional Philippine folk songs, a Japanese mode, traditional Korean music, and various Asian percussion instruments. This study explicates these Asian influences and how Lee utilized them in his Mass for AILM.