The Osaka International Women's Marathon (大阪国際女子マラソン) is an annual marathon road race for women over the classic distance of 42.195 kilometres which is held on the 4th or 5th Sunday of January in the city of Osaka, Japan, and hosted by Japan Association of Athletics Federations, Kansai Telecasting Corporation, the Sankei Shimbun, Sankei Sports, Radio Osaka and Osaka City. The first edition took place on January 24, 1982, and was won by Italy's Rita Marchisio. The 1995 marathon was cancelled due to the Great Hanshin earthquake. The race takes place in the city and passes prominent landmarks such as Osaka Castle. The course was altered in 2011 to allow for faster times by cutting out a number of hilly sections near Osaka Castle. The finish line of the race is at Nagai Stadium, which was the host venue for the 2007 World Championships in Athletics. The Osaka Half Marathon, open regardless of gender, is held alongside the women's marathon. The Japanese rock group The Alfee provided a new theme song for Kansai TV's broadcast of the event every year for 31 consecutive years from 1987 until 2018, when the broadcaster announced they would no longer use themes. The band were certified with a Guinness World Record for the achievement in December 2018.

Winners

Key:

• Tetyana Hamera-Shmyrko was suspended by the Ukrainian Athletic Federation for four years from 30 September 2015 until 29 September 2019 due to doping rules violation. All her results from 26 August 2011 to 30 September 2015, including victories in the 2013, 2014 and 2015 editions of the Osaka International Ladies Marathon, were annulled.