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.