Masayuki Onishi (大西 昌之, Ōnishi Masayuki, born July 5, 1977) is a former Japanese football player.
Onishi was born in Hokkaido on July 5, 1977.
After graduating from Aichi Gakuin University, he joined J1 League club Yokohama F. Marinos in 2000.
In 2001, he moved to J2 League club Albirex Niigata.
This biographical article related to a Japanese association football forward, born in the 1970s is a stub.