Zoku and Rokabiri-zoku

Zoku (族^?) is a Sino-Japanese term meaning tribe, clan, or family. As a suffix it has been used extensively within Japan to define subcultural phenomena, though many zoku do not acquire the suffix (e.g. cosplay).

Although zoku was applied to others in society, like senior citizens, salarymen, and political activists (e.g. Uyoku dantai), it was mostly used to label youth subcultures.

Some Japanese youths admired American music, and Japanese Bill Haley clones were known as rokabiri zoku (the rockabilly tribe).

Rockabilly is one of the earliest styles of rock and roll music, dating to the early 1950s.