Kato's first compilation album Best Destiny (2008) became her first number-one album, certified platinum in Japan. Her fourth studio album Ring became her best-selling album, and yielded three top-ten singles: "Sayonara Baby", "20 -Cry-", and "Love Forever", which was certified million in Japan.
Kato's first compilation album Best Destiny (2008) marked the beginning of her success, reaching number-one status and earning platinum certification in Japan. Her fourth studio album Ring was her most successful release to date, producing three top-ten singles: "Sayonara Baby", "20 -Cry-", and "Love Forever", which sold a million copies in Japan.