Kashima won a bronze medal in "pommel horse" at the 2002 World Artistic Gymnastics Championships in Debrecen. At the 2003 World Artistic Gymnastics Championships in Anaheim he won a gold medal in "high bar", a gold medal in "pommel horse", and a bronze medal with Japan in the team final. He won a bronze medal in "pommel horse" at the 2005 World Artistic Gymnastics Championships in Melbourne.