Kasumi Nishihara (西原 加純, Nishihara Kasumi, born 1 March 1989) is a Japanese athlete specialising in the long-distance events.^[1] She won two medals at the 2009 Summer Universiade – the gold in the 10,000 metres and the silver in the 5000 metres.

International competitions

Representing  Japan

Year	Competition	Venue	Position	Event	Notes
2008	Asian Junior Championships	Jakarta, Indonesia	2nd	5000 m	17:11.14
	World Junior Championships	Bydgoszcz, Poland	5th	5000 m	16:33.28
2009	Universiade	Belgrade, Serbia	2nd	5000 m	15:46.95
			1st	10,000 m	33:14.62
2014	Asian Games	Incheon, South Korea	8th	10,000 m	32:41.49
2015	World Championships	Beijing, China	13th	10,000 m	32:12.95

Personal bests

Outdoor

• 3000 metres – 9:15.9 (Kyoto 2006)
• 5000 metres – 15:23.80 (Yamaguchi 2011)
• 10,000 metres – 31:53.69 (Kobe 2014)
• 10 kilometres – 32:26 (Okayama 2010)
• Half marathon – 1:11:58 (Kyoto 2009)