If it was imported from Asia, the DVD's will be Region 3 I think from this list:
REGION 1 -- USA, Canada
REGION 2 -- Japan, Europe, South Africa, Middle East, Greenland
REGION 3 -- S.Korea, Taiwan, Hong Kong, Parts of South East Asia
REGION 4 -- Australia, New Zealand, Latin America (including Mexico)
REGION 5 -- Eastern Europe, Russia, India, Africa
REGION 6 -- China
REGION 0 or REGION ALL -- Discs are uncoded and can be played Worldwide, however, PAL discs must be played in a PAL-compatible unit and NTSC discs must be played in an NTSC-compatible unit.
So, if you have a Region Free DVD player, as some are, then you could play any disc, and so ones from Asia too.
Some DVD software for example like "Power DVD" I think can also play in Region Free mode, though I guess it depends on your DVD Rom drive too.
So it might be worth checking up on that