Ritsuko Okazaki (岡崎 律子, Okazaki Ritsuko, December 29, 1959 – May 5, 2004) was a Japanese singer-songwriter born on Hashima Island, Nagasaki Prefecture. She first made her professional debut with the single, Kanashii Jiyū / Koi ga, Kiete Yuku. She is also known as the Shelby Flint of Japan.
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Leo Jaime
Utada Hikaru
Do As Infinity
Ikimono Gakari
Lisa
Chrystian
Miki Matsubara
Glay
The Brilliant Green
Boku no Hero (My Hero Academia)