is a Japanese track and field sprinter and hurdler, who specializes in the 400 metres sprint and 400 metres hurdles. She competed for her country as part of the Japanese women's 4 × 400 metres relay team at the Summer Olympics in 2008 and the World Championships in Athletics three times (2007, 2009, 2015). She has been a four-time medallist in the relay at the Asian Athletics Championships (2007, 2011, 2013, 2017), including a gold medal in 2011. She won her first major international medal in the hurdles – a bronze – at the 2017 Asian Athletics Championships.
Aoki competed for the women's 4 × 400 m relay at the 2008 Summer Olympics in Beijing, along with her teammates Mayu Kida, Satomi Kubokura, and Asami Tanno. She ran on the anchor leg of the first heat, with an individual-split time of 52.64 seconds. Aoki and her team finished the relay in last place for a seasonal best time of 3:30.52, failing to advance into the final.
Born in Gifu Prefecture, she attended Fukushima University and represented her country as a student-athlete at the 2007 Universiade.
International competitions Representing 2007Asian ChampionshipsAmman, Jordan5th400 m hurdles59.552nd4 × 400 m relay3:33.82UniversiadeBangkok, Thailand12th (h)400 m hurdles58.80World ChampionshipsOsaka, Japan11th (h)4 × 400 m relay3:30.172008Olympic GamesBeijing, China15th (h)4 × 400 m relay3:30.52 2009World ChampionshipsBerlin, Germany38th (h)400 m hurdles63.5614th (h)4 × 400 m relay3:34.46Asian ChampionshipsGuangzhou, China7th400 m hurdles62.212010Asian GamesGuangzhou, China4th4 × 400 m relay3:31.812011Asian ChampionshipsKobe, Japan4th400 m54.151st4 × 400 m relay3:35.002013Asian ChampionshipsPune, India3rd4 × 400 m relay3:35.72East Asian GamesTianjin, China2nd400 m hurdles58.062nd4 × 400 m relay3:40.552015IAAF World RelaysNassau, Bahamas2nd (B)4 × 400 m relay3:34.65Asian ChampionshipsWuhan, China6th400 m54.614th4 × 400 m relay3:35.93World ChampionshipsBeijing, China13th (h)4 × 400 m relay3:28.912017Asian ChampionshipsBhubaneswar, India3rd400 m hurdles58.183rd4 × 400 m relay3:37.742019Asian ChampionshipsDoha, Qatar10th (h)400 m hurdles59.43
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