Cika wannan jumlar: dan wasan Japan ne. Ta yi gasa a
gasar mita 200 ta mata a gasar Olympics ta 2016. A watan Afrilu na 2017, Hasegawa ya karya tarihin duniya na matasa a cikin 200 butterfly tare da 2:06.29 a Japan Nationals. Ta cancanci wakiltar Japan a wasannin Olympics na bazara na 2020.