Sumie Inagaki (稲垣寿美恵, Inagaki Sumie, born 6 April 1966) is a Japanese ultramarathon runner from Hokkaido.

Inagaki holds current women's world record in 24-hour run Indoor (240.631 kilometres (149.521 miles), Espoo FIN, Jan 2011),[1] and in 48-hour run Track (397.103 kilometres (246.748 miles), Surgeres FRA, May 2010).

[2] She is a two time female winner of IAU 24-Hour Run World Championship.

[5] 2014 2013 2012 2011 2010 2009 2006 After graduating from college, Inagaki worked at a kindergarten.

[20] Inagaki states that ultramarathon is not her job, but what she loves to do, where she finds the joy of life.