The crazy teenage bike gangs that terrorize urban Japan. They organize "races" through downtown Tokyo often during high-traffic periods causing accidents, frequently deadly to by themselves and others. The "race" is not a race since the leader, whom holds the banner of this group, cannot be overtaken. One other individuals, whom may number in dozens speed in and out of traffic in attempts to decelerate driver and distract the authorities. Bosozuko are thought of by main-stream Japanese as thugs, predecessors of their older yakuza brothers, which definitely recruit from their particular ranks.