Mariko Tone (刀根 麻理子, Tone Mariko; born March 3, 1962 in Kawasaki, Kanagawa, Japan) is a Japanese singer, actor and essayist. Tone also covers children's songs under the pseudonym Hanako Nohara. Tone sings in Japanese and, to a limited extent, in English. One of her songs titled "Derringer" became an opening theme to anime series Cat's Eye.
Source: “Mariko Tone”, English Wikipedia (CC BY-SA 4.0), excerpt