Rubuta ci gaba ga wannan sakin layi - shi ne dan wasan Japan. Ta yi gasa a tseren mita 200 na mata
a gasar Olympics ta shekara 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.