Kammala jumla mai zuwa: Yin wasa a flanker, Kajihara ya buga 21 Tests don Japan tsakanin 1989 da 1997. Ya zira kwallaye 19 daga kokarinsa hudu. Kajihara ya taka leda a duka biyu
1991 da 1995 Rugby World Cups don Japan. Ya buga wasanni uku a kowace gasar cin kofin duniya ciki har da wasanni da Scotland, Ireland da All Blacks.