The GS boom peaked around the summer of 1968, and more than 100 groups made their record debuts, but in the spring of 1969, major members withdrew from popular groups such as The Tigers, The Carnabeats, and OX, and again. Jackey Yoshikawa and his Blue Comets even recorded songs on a mood song line. Around 1970, the GS boom came to an end, and in 1971, most groups were disbanded or disappeared spontaneously. After that, among the people who served as lead vocals in the popular Group Sounds, there are many people who continue to be active on the entertainment such as solo singers, musicians, actors, and talents even after the group disbanded. In addition, there are some people who have served as other musical instrument parts, such as actors, composers, studio musicians, music producers, and entertainment agency managers, who are among the important figures in the entertainment world.