Japanese singer-songwriter Ringo Sheena, as a solo musician, has recorded material for eight albums, as well as for various non-traditional albums, singles and side projects. Sheena debuted as a musician in 1998 with the single "Kōfukuron," and released her debut studio album Muzai Moratorium in 1999. She followed this with her second album Shōso Strip and the three-CD single set Ze-Chyou Syuu in 2000. During this period she toured extensively, and formed several bands to perform her concerts. One of these, the girls band Hatsuiku Status, performed entirely new compositions for their concert.