Hironaga was born in Osaka Prefecture on 25 July 1975.
He played many matches at Gamba, and returned to Verdy in June 1999.
His opportunity to play decreased in 2001 and he moved to the J2 League club Yokohama FC.
In July 1996, Hironaga was selected Japan U-23 national team for 1996 Summer Olympics.
This biographical article related to a Japanese association football midfielder born in the 1970s is a stub.