Murofushi comes from a hammer throwing family, as her father Shigenobu Murofushi is a former Olympian and held the Japanese record for decades, and her brother Koji Murofushi, is the 2004 Olympic champion in the event. Her mother, Serafina Moritz, who comes from the Hungarian minority in Romania, is a former European junior javelin champion and Romanian senior champion. The parents are now divorced.
She won the 2010 Japanese title in both the discus and hammer throw events.
|1996||World Junior Championships||Sydney, Australia||6th||Discus throw||51.56 m|
|1997||East Asian Games||Busan, South Korea||3rd||Discus throw||51.90 m|
|2000||Asian Championships||Jakarta, Indonesia||5th||Discus throw||53.14 m|
|2nd||Hammer throw||58.64 m|
|2001||East Asian Games||Osaka, Japan||3rd||Discus throw||50.87 m|
|2003||Asian Championships||Manila, Philippines||5th||Discus throw||54.08 m|
|2004||Olympic Games||Athens, Greece||27th||Hammer throw||65.33 m|
|2005||Asian Championships||Incheon, South Korea||4th||Discus throw||56.23 m|
|3rd||Hammer throw||62.62 m|
|World Championships||Helsinki, Finland||27th (q)||Hammer throw||62.83 m|
|East Asian Games||Macau||3rd||Discus throw||54.28 m|
|3rd||Hammer throw||63.67 m|
|2006||Asian Games||Doha, Qatar||4th||Discus throw||52.26 m|
|4th||Hammer throw||59.74 m|
|2007||World Championships||Osaka, Japan||27th (q)||Discus throw||52.76 m|
|2009||Asian Championships||Guangzhou, China||4th||Discus throw||55.14 m|
|3rd||Hammer throw||61.99 m|
|2010||Asian Games||Guangzhou, China||6th||Discus throw||50.28 m|
|3rd||Hammer throw||62.94 m|
|2011||Asian Championships||Kobe, Japan||8th||Discus throw||49.24 m|
|3rd||Hammer throw||62.50 m|
- Hammer throw – 67.77 m (2004 in Fujiyoshida) – national record.
- Discus throw – 58.62 m (2007 in Gifu) – national record.
- "Elcserélt nemzet - magyar olimpikonok más ország színeiben" (in Hungarian). Heti Válasz. 13 August 2012. Retrieved 30 November 2012.
- Andru Nenciu (2008-12-13). "Ciocan norocos". ProSport (in Romanian). Retrieved 2012-11-30.
- Nakamura, Ken (2010-06-07). Murofushi and Murakami extended their winning streak at the Japanese National Championships . IAAF. Retrieved on 2010-06-07.
- Japanese athletics records Archived October 9, 2007, at the Wayback Machine.
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