Koorogi '73

Koorogi '73 is a Japanese Chorus-Unit.

The correct name in Japanese is Koorogi Nanajuusan and means Cricket '73.

They disbanded after 1990.

The members were:
1973 - 1990: Ookura Masahiro (大倉正丈)
1977 - 1990: Ueno Hiroki (上野博樹)
1972 - 1990: Tsushima Takafumi (津島隆文)
1972 - 1982: Satomi Sanori (さとまさのり)
1972 - 1977: Kishi Tatsuya (岸龍也)
1972 - 1973: Makino Riyuki (まきのりゆき)

(Source: AniDB)