Koga Shuko is the dictator of evildoers that run all over Bloody Town. He is a wealthy businessman and former crime lord seeking to possess both halves of the fabled "Double Dragon" medallion, a mystical amulet said to grant great power to those who possess it. He is an excellent martial artist with invincible strength who seeks to have complete control over all of the street gangs of New Angeles.
Years ago, then crime lord Victor Guisman ordered a raid to a village located in a remote region of China in search of the "Double Dragon". His henchmen succeeded in obtaining one half of the amulet, leaving Guisman with the pending matter of finding the other one in order to one day achieve ultimate power.
Now in present times and going under the alias of "Koga Shuko", Guisman has risen to power as a wealthy executive, having great influence in the post-apocalyptic city of New Angeles. He commands most of the street gangs in the city and seeks to consolidate his power by gaining total control over them.
One of his henchmen (Bo Abobo) manages to learn the whereabouts of the other half of the medallion, which happens to be in possession of Billy Lee, a teenage martial arts practitioner along with his twin brother Jimmy.
With this information, Shuko, accompanied by a troop of his best men, makes presence at the abandoned theater where the Lee brothers live under the care of their adoptive mother, Satori. A fight ensues between the two groups and Satori ends up sacrificing herself in order to allow her two adoptive sons to escape (the theater explodes with her inside due to Shuko's doings).
In his obsession for the other half of the medallion, Shuko orders all the street gangs of the city to find the Lee brothers. After various pursuits, fights and miraculous escapes, Shuko ultimately manages to get possession of their other half. The Lees confront him in a final showdown in his own office building. Reuniting the two halves of the amulet, he transforms into two mystical "shadow warriors" who battle the Lee brothers. However, these manage to each retrieve one piece of the amulet, get the upper hand with their new acquired powers, and finally defeat Shuko. The police arrives shortly after and he is arrested.
Voice: Osamu Saka
Birthplace: Los Angeles
Height: 6′ 1″
Weight: 189 lbs.
Fighting style: Kobujutsu & Ninpoh
Hobbies: Chess, shogi (Japanese chess)