Nomura swept the All-Japan Selected judo championships again in 1997, and won a gold medal at the 1997 World Judo Championships in Paris to reinforce his position as the premier competitor at his weight class. After winning the All-Japan Selected judo championships for the third consecutive year in 1998, he injured his left knee in the Jigoro Kano Cup semi-finals on January 9, 1999, and was forced to withdraw from the competition. He did not participate in competitions for the rest of the year to recover from this injury and to complete his degree in health education.