Osaka hosts four professional sport teams: one of them is the Orix Buffaloes, a Nippon Professional Baseball team, playing its home games at Kyocera Dome Osaka. Another baseball team, the Hanshin Tigers, although based in Nishinomiya, Hyōgo, plays a part of its home games in Kyocera Dome Osaka as well, when their homeground Kōshien Stadium is occupied with the annual National High School Baseball Championship games during summer season.
There are two J.League clubs, Gamba Osaka, plays its home games at Osaka Expo '70 Stadium. Another club Cerezo Osaka, plays its home games at Nagai Stadium. The city is home to Osaka Evessa, a basketball team that plays in the bj league. Evessa has won the first three championships of the league since its establishment. Kintetsu Liners, a rugby union team, play in the Top League. After winning promotion in 2008-09, they will again remain in the competition for the 2009-10 season. Their base is the Hanazono Rugby Stadium.
The Sangatsubasho , one of the six regular tournaments of professional Sumo is held annually in Osaka at Osaka Prefectural Gymnasium.
Another major annual sporting event that takes place is Osaka is Osaka International Ladies Marathon. Held usually at the end of January every year, the 42.195 km race starts from Nagai Stadium, runs through Nakanoshima, Midōsuji and Osaka castle park, and returns to the stadium. Another yearly event held at Nagai Stadium is the Osaka Gran Prix Athletics games operated by the International Association of Athletics Federations (IAAF) in May. The Osaka GP is the only IAAF games annually held in Japan.