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Sport Swimming
NOC Japan   
Born25 Jan 2000 in Tokyo, JPN
Height1.66 m
 Human Interest 
Further Personal Information
Higher education
Sports Science - Nihon University: Tokyo, JPN
Sport Specific Information
When and where did you begin this sport?
She began swimming at age three in Tokyo, Japan.
Why this sport?
She was influenced by her parents.
Club / Team
Nihon University [JPN] / Tokyo Dome [JPN]:
Name of coach
Shigeru Hasegawa [father, Tokyo Dome], JPN, from 2018; Yoshimitsu Shimoyama [national], JPN
International Debut
Competing for
Sydney, NSW, AUS
General Interest
Hero / Idol
Her parents. (city.kita.tokyo.jp, 13 Oct 2017)
Sporting philosophy / motto
"Hard work pays off," (nihon-u.ac.jp, 15 Apr 2018)
Awards and honours
She received the Toshima City Sports Merit Award in Japan in 2017. (city.toshima.lg.jp, 01 Nov 2017)

She received an Excellence Award at the 2017 Japan Aquatic Awards. (tobiuojapan.org, 23 Jan 2018)
Other information
In 2018 she decided to be coached by her father Shigeru following the advice of Masao Iizuka, who had coached her since she was in middle school. Although her father hesitated to take over the position due to a lack of coaching experiences at elite level, she encouraged him to train with her. "I call him 'papa' at home, but 'Coach Hasegawa' in the pool'." (mainichi.jp, 13 Jun 2019; the-ans.jp, 10 Jul 2019; nhk.or.jp, 07 Apr 2021)

 Competition Highlights
Olympic Games
Rank Year Venue Event Result
9 2021 Tokyo, JPN 200m Butterfly 2:09.42
Semifinal 2016 Rio de Janeiro, BRA 200m Butterfly 2:07.33
World Championships
Rank Year Venue Event Result
Semifinal 2019 Gwangju, KOR 200m Butterfly 2:09.22
Heats 2019 Gwangju, KOR 100m Butterfly 58.71
6 2017 Budapest, HUN 200m Butterfly 2:07.43
World Championships Short Course
Rank Year Venue Event Result
3 2018 Hangzhou, CHN 200m Butterfly 2:04.04
World Cup
Rank Year Venue Event Result
4 2018 Tokyo, JPN 200m Butterfly 2:04.36
5 2016 Tokyo, JPN 200m Butterfly 2:07.57
Asian Championships
Rank Year Venue Event Result
8 2012 Dubai, UAE 100m Butterfly 1:02.36
Heats 2012 Dubai, UAE 50m Butterfly 29.02
Asian Games
Rank Year Venue Event Result
3 2018 Jakarta, INA 200m Butterfly 2:08.80