Twenty six out of the world's top 30 players will take part in the two-million-dollar hard court tournament, with only Kim Clijsters, Serena and Venus Williams and Justine Henin missing.
Sharapova won her first WTA singles and doubles titles at the 2003 Japan Open in Tokyo, and earned her first professional title on the ITF Circuit series in Gunma, north of the capital, a year earlier