Yukiko Ueno is a Japanese, medal-winning Olympian, professional right-handed softball pitcher for Bic Camera Takasaki Bee Queen and the Japanese national team, who holds a bronze and two gold medals from the 2004, 2008 and 2020 Summer Olympics, respectively. She became the first pitcher ever to throw a perfect game at the Olympics, against China in Athens. With a fastball that tops out at 128 km/h (80 mph), she is widely recognized as the fastest pitcher in women's softball, although her signature pitch is her change-up, which is often cited as the best in the world.

Softball was a women's sporting event at the 2004 Summer Olympics. Games were played at the softball stadium in the Helliniko Olympic Complex from August 14 to 23. The United States won the gold while Australia took silver and Japan received bronze.