Career
Jang competed for of Korea at the 2004 Summer Olympics in men"s individual archery. In the second round of elimination, he was again victorious and advanced to the round of 16. The third match was Jang"s downfall, as he lost to eventual bronze medalist Tim Cuddihy of Australia.
Jang placed 11th overall.
Jang holds the world record for 90 meters with a score of 338 points shot during the 2003 New York World Championship, tournament where he remarkably only shot one single arrow outside the gold ring.