Miyamoto was born in Sagamihara on December 31, 1978. After graduating from Sagami-Ono High School, she joined Prima Ham FC Kunoichi (later "Iga FC Kunoichi") in 1997. She was selected Best Eleven 2 times (1999 and 2003). She took maternity leave in 2005 season. She came back from 2006 season. In 2009, she moved to TEPCO Mareeze. In 2011, she returned to Iga FC Kunoichi. End of 2012 season, she retired.