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.
Leo Jaime
Utada Hikaru
Do As Infinity
Ikimono Gakari
Lisa
Chrystian
Miki Matsubara
Glay
The Brilliant Green
Boku no Hero (My Hero Academia)