What is "sifow"

(born May 11, 1985), known by her stage name Sifow (stylized as sifow), is a Japanese pop singer, model and businesswoman. She signed to the Avex Trax music label in 2006, but in 2008 she announced her retirement from the music industry. She has since focused on business, health advocacy and has established Office G-Revo Corporation in 2010.