Born and raised in Kagoshima, she relocated to Osaka in 2002 after winning the Super Starlight Audition and signing a recording contract with Being.
In July 2002, Shizukusa appeared in the compilation album Giza Studio Mai-k & Friends Hotrod Beach Party alongside the other Being artists including Mai Kuraki, Rina Aiuchi, and Yuri Nakamura.
In April 2002, she won the 1st place on the audition called "Super Starlight Contest" brought by Giza Studio.
After that, she appeared on some compilations like "GIZA studio MAI-K & FRIENDS HOTROD BEACH PARTY" and "DAY TRACK: Lady Mastersoul".
On April 14, she released the lead single from her 2nd album "Yumi Shizukusa II", "Kokoro wa itsumo Rainbow Color".
It was used in Japanese famous TV mystery drama "Kyoto Chiken no Onna" and gained many airplays.
On February 24, she appeared on KG's album "Love for you" and sang "Kanawanai Koi demo" with him.
On July 31, 2018, she provided music Wanna Be Loved for the image movie of the women's luxury brand "Elza Winkler".
On the same year in December, Shizuku announced through her instagram profile about not renewing contract with agency and retired as a singer, however in future claims to be active as a painting artist only.