The Japan Open Tennis Championships is an ATP World Tour 500 tournament played at Ariake Colosseum in Kōtō, Tokyo, Japan. The Ariake Colosseum consists of 48 tennis courts and a stadium with a retractable roof. The championship includes Men and Women Singles 32 and Doubles 16 and is played on hard outdoor courts.
Previous Men Singles winners include: Stefan Edberg, Pete Sampras, John McEnroe, Ivan Lendl, Nicolas Kiefer, Roger Federer, and others.
Previous Women Singles winners include: Kimiko Date, Amy Frazier, Monica Seles, Maria Shapirova, Marion Bartoli, and others.