Shiina is her 2nd name, Ringo is her pseudonym and means apple, because her exquisite and white cheeks turns red when she's on stage.
Yumiko is her real 1st name, and her talent is more than amazing.
I "met" her in Chile at youtube, there are many videos, most of them are Shiina's solo career. She plays Jazz, bossa nova, rock, ballad, and she is beautiful.
She has 10 years of career, and I hope to found in bestbuy her live dvd RINGO EXPO 08.
p.s.: Don't think in bjork, or any sassy videogame-nippon-song. She's truly the queen of music