Iwasaki made her official debut in April 1975 with the single "" — "Dyuetto", after winning a record contract on the popular Japanese talent competition show
Star Tanjō! in the summer of 1974. The single peaked at no. 19, according to the
Oricon charts. Its follow up, "Romance", peaked at no. 1, maintained its place for three weeks, and sold over a million units. It was written by
Yu Aku and Kyohei Tsutsumi, and got her nominated for
The Best Newcomer of the Year at the 17th edition of the
Japan Record Awards, and made her first performance on the 26th edition of
Kohaku Uta Gassen with this song. The disco inspired "Sentimental" was issued as a single in October of that same year, and with sales exceeding 700,000, became her second no. 1 hit, and maintained its place for two weeks. == Discography ==