God Speed You! Black Emperor(ゴッド・スピード・ユー! BLACK EMPEROR,Goddo Supīdo Yū! Burakku Enperā?) is a 1976 Japanese black-and-white 16 mm documentary film, 90 minutes long, by director Mitsuo Yanagimachi, which follows the exploits of young Japanese motorcyclists, the "Black Emperors". The 1970s in Japan saw the rise of a motorcycling movement called the bōsōzoku, which drew the interest of the media. The movie follows a member of the "Black Emperors" motorcycle club and his interaction with his parents after he gets in trouble with the police.