The crazy teenage bike gangs that terrorize urban Japan. They organize "races" through downtown Tokyo often during high-traffic periods causing accidents, often fatal to themselves and others. The "race" is not really a race since the leader, who carries the flag of the gang, cannot be overtaken. The other participants, who may number in the dozens speed in and out of traffic in attempts to slow down motorist and distract the police. Bosozuko are thought of by mainstream Japanese as thugs, predecessors of their older yakuza brothers, who actively recruit from their ranks.

The bosozuko rider opened the throttle on his modified Ninja to accelerate through a red light at 120 miles per hour, only to be creamed by a delivery truck in the intersection.

which consists of driving down streets at high (illegal) speeds. It is not properly a race; mostly, it is done just for the thrill of it. With many cars (or bikes) involved, the leading one is driven by the sentōsha (先頭車, the leader, who is responsible for the event. Nobody is allowed to overtake him. Others keep a lookout for side and rear cars/bikes. Although they do race, some groups prefer to just bōsō, or violently run. They apply ear crunching mufflers and roll through suburbs at speeds of 5-10 miles an hour, waving imperial Japanese flags and shouting obscenities, occasionally throwing Molotov cocktails and carrying swords/spears, daring anyone to do something.

Drifting - many former bōsōzoku members would become involved in and some would later compete in the D1 Grand Prix series, notably Toyohisa Matsuda a former gang member, who wear a headband and carries a toy baseball bat, one of many typical weapon that is similar in characteristics by bōsōzoku members.