, known professionally as , was a female Japanese pop singer, songwriter, and member of the group Zard. As Sakai was the only member who stayed in the group while others joined and left regularly, Zard and Sakai may be referred to interchangeably. She was the best-selling female recording artist of the 1990s and has sold over 37 million copies of sales, making her one of the best-selling music artists in Japan of all time. Biography Born in Hiratsuka, Kanagawa, Sakai grew up in Hadano, Kanagawa. Her father was a driving instructor, and she had a younger brother and younger sister. After her death, a neighbor recalled how popular and beautiful Sakai had been in elementary school. She was also athletic, joining the track and field team in junior high and playing tennis in high school. Graduating from Shoin Women's College (now Shoin University) in Atsugi City, Kanagawa, Sakai worked in a real estate company office for two years before being scouted by Stardust Promotion. Throughout her life, Sakai remained with her family, living modestly and mostly out of the public eye. Upon achieving career success, she helped pay for her parents home renovation. Acquaintances say that she commuted by subway every day, often wore T-shirts and minimal makeup. She did not wear any makeup in all seven of the television appearances she made in her lifetime. In promoting her third single, "Mō Sagasanai," and first album, Good-bye My Loneliness on February 6, 1991, she wore glasses in the television interview, citing the fact she had not slept the night before. She also indicated that she often slept in the morning rather than the evening. Sakai had a well-rounded personality. She began playing the piano at age four and aspired to be a musician at a very young age. She visited galleries, attended theater productions, made dry flowers, and painted in oil in her spare time. She also stated that one reason she did not like to travel was that she was not accustomed to eating sashimi and preferred cooked food. Because she was hardly ever seen in public, there were unsubstantiated conspiracy theories in Japan that works by Zard were not produced by the woman pictured (Sakai): She was referred to as an urban legend. Sakai appears to have been shy. In her first appearance on Music Station, she was asked what took Zard so long to appear on