The 2006 AIG Japan Open Tennis Championships was a tennis tournament played on outdoor hard courts. It was the 33rd edition of the event known that year as the AIG Japan Open Tennis Championships, and was part of the International Series Gold of the 2006 ATP Tour, and of the Tier III Series of the 2006 WTA Tour. Both the men's and the women's events took place at the Ariake Coliseum in Tokyo, Japan, from 2 October through 8 October 2006. Roger Federer and Marion Bartoli won the singles titles.
See main article: 2006 AIG Japan Open Tennis Championships – Men's singles. Roger Federer defeated 
Tim Henman, 6–3, 6–3
See main article: 2006 AIG Japan Open Tennis Championships – Women's singles. 
Marion Bartoli defeated 
Aiko Nakamura, 2–6, 6–2, 6–2
See main article: 2006 AIG Japan Open Tennis Championships – Men's doubles. 
Ashley Fisher / 
Tripp Phillips defeated Paul Goldstein / Jim Thomas, 6–2, 7–5
See main article: 2006 AIG Japan Open Tennis Championships – Women's doubles. Vania King / Jelena Kostanić defeated Chan Yung-jan / Chuang Chia-jung, 7–6(7–2), 5–7, 6–2