Hiroyuki Kajihara (梶原宏之, Kajihara Hiroyuki) (born 28 September 1966 in Yamanashi, Japan) is a former rugby union footballer who played for Japan.
Kajihara played in both the 1991 and 1995 Rugby World Cups for Japan.
He played three games in each World Cup including matches against Scotland, Ireland and the All Blacks.
He coached the Katsura High School and then, the Hikawa High School, both teams from his hometown, Yamanashi.
This Japanese rugby union biography is a stub.