[1][2] Their debut single "Aoi Hitomi" ("Blue Eyes") was an immediate success, selling over 100,000 copies in its English-language version and over 500,000 copies in its Japanese-language version.

[1] They appeared on The Ed Sullivan Show performing their major hit song of 1967 "Blue Chateau" (ブルー・シャトウ, "Burū shatō"), which won a Japan Record Award and sold over one million copies [1][2][3] Thanks to their popularity, they were the first musical group invited to participate in a Kōhaku Uta Gassen contest.

[1] Their last song to chart was "Ame no Hymn", which was released in January 1971 and reached the No.

[1] In October 1971 Tadao Inoue, Kenji Takahashi, and Tsunaki Mihara left the group, replaced by new members.

[3] The surviving members of the original line-up reunited in October 2001.