Rakuten Japan Open Tennis Championships, Tokyo
In 1973-1989 the tournament was a part of the Grand Prix Circuit. From 1990 to 1999 the tournament was a part of Championship Series (now - ATP World 500 series). From 2000 to 2008 tennis tournament in Tokyo was a part of International Series Gold (now - ATP World 500 series). Since 2009, the tournament has been a part of the ATP World 500 series.