Between August 1998 and September 2008, the Recording Industry Association of Korea (RIAK) and the Music Industry Association of Korea (MIAK) published a monthly record chart, ranking the best-selling CDs and cassettes within South Korea.
In early 1998, South Korea's National Tax Service decided that the music industry should be more transparent.
The record labels had to submit the sales of an album up to six months after its release.
[3] One listed the best-selling albums between March and August 1998, topped by Seo Taiji's self-titled debut studio album, which sold more than 1.1 million copies.
[4] On the other list, Uhm Jung-hwa's Invitation was ranked as the best-selling album of August 1998.