|Native name||小平 奈緒|
|Born||26 May 1986|
Chino, Nagano, Japan
|Height||1.65 m (5 ft 5 in)|
|Weight||61 kg (134 lb)|
|Event(s)||500 m, 1000 m, 1500 m|
She is the 2018 Olympic champion in the 500 m distance. Kodaira is the first Japanese woman to win an Olympic gold medal in speed skating.
In 2009, she graduated from Shinshu University with a bachelor's degree in education.
At the 2010 Winter Olympics she won a silver medal in the team pursuit event. She placed 5th in the 1000 and the 1500 m events and 12th in the 500 m one at the Olympics. At the 2014–15 World Cup stop in Seoul, South Korea, on 21 November 2014, she won the 500 m event, and she has a total of 25 podium placings in the world cup. At the 2015 world single distance championships, she won the bronze medal in the 500 m event.
At the 2017 world single distance championships, she became the first Japanese woman to win an individual single distance world title winning the women's 500 m event. She won also silver medal in the 1000 m event at the championships. At the world sprint championships in the year, she won the women's competition. In the season, she became overall winner of ISU World Cup 500 m cup.
Kodaira took the top step also in every single ISU world cup one in the 2017–18 season ahead of the Olympics.
She is the current world record holder in the 2×500 metres and the sprint combination, and the former world record holder in the 1000 metres and the team sprint, as well as the current Olympic and Japanese record holder in the 500 metres.
At the 2018 Winter Olympics, Kodaira won gold medal in the women's 500 m event and silver one in the women's 1000 m event respectively. In the former, she also set an Olympic record and became the first woman to break the 37-second barrier at sea level, as well as the first female Japanese Olympic champion in speed skating.
|500 m||36.39||16 March 2019||Olympic Oval, Calgary||Current Japanese record.|
|500 m (sea level)||36.94||18 February 2018||Gangneung Oval, Gangneung||Current sea-level world best, current Olympic record.|
|2×500 m||73.55||26 February 2017||Olympic Oval, Calgary||Current world record.|
|1000 m||1:11.77||9 March 2019||Utah Olympic Oval, Salt Lake City|
|1500 m||1:52.82||16 February 2020||Utah Olympic Oval, Salt Lake City|
|Team sprint||1:26.82||14 November 2015||Olympic Oval, Calgary||Former world record.|
|Sprint comb.||146.390||25–26 February 2017||Olympic Oval, Calgary||Current world record.|
|1000 m||1:12.09||10 December 2017||Utah Olympic Oval, Salt Lake City||World record until beaten by Brittany Bowe on 9 March 2019.|
|500 m||36.94||18 February 2018||Gangneung Oval, Gangneung||Current Olympic record.|
- "Kodaira captures women's 500-meter title at world championships". Japan Times. 10 February 2017. Retrieved 10 February 2017.
- "ISU RESULTS". isuresults.eu. Archived from the original on 22 December 2017. Retrieved 20 February 2018.
- "Evolution of the world record Sprint combination Women". speedskatingstats.com. Retrieved 28 April 2017.
- "Evolution of the world record 1000 meters Women". speedskatingstats.com. Retrieved 11 March 2019.
- "Olympic Records". SpeedskatingResults.com. Retrieved 11 March 2019.
- "National Records – Japan (JPN)". speedskatingresults.com. Retrieved 11 March 2019.
- Harris, Beth (18 February 2018), "Japan's Nao Kodaira wins 500-meter speedskating gold over South Korea's Lee Sang-hwa", Chicago Tribune
- "Nao Kodaira". speedskatingresults.com. Retrieved 1 September 2020.
- "Speed Skating – Records – Historical World Record 2 x 500m – Ladies". ISU. 26 February 2017. Retrieved 25 September 2017.
- "Nao Kodaira". speedskatingstats.com. Retrieved 11 March 2019.
- "ISU World Cup Speed Skating Calgary – Result Team Sprint Ladies". ISU. 1 December 2017. Archived from the original on 3 December 2017. Retrieved 4 March 2018.
- Nao Kodaira at the International Skating Union
- Nao Kodaira at International Olympic Committee
- Nao Kodaira at Olympic Channel
- Nao Kodaira at Olympedia
- Nao Kodaira in SpeedSkatingBase.eu
- Nao Kodaira at SpeedSkatingNews.info
- Nao Kodaira at SpeedSkatingStats.com
| Women's sprint combination speed skating world record
26 February 2017 – present
| Women's 1000 m speed skating world record
10 December 2017 – 9 March 2019