Born in Taiwan under Japanese rule, Yokozawa graduated from Meiji University.

[2] At the beginning of the Japanese Baseball League (JBL), Yokozawa managed the Tokyo Senators in 1936–1937.

Trapped by a lack of funds, Yokozawa was forced to resign as the team's manager after one season.

When the JBL reorganized into Nippon Professional Baseball in 1950, Yokozawa was named umpire-in-chief of the Pacific League division.

[citation needed] Yokozawa was elected by the Special Committee to the Japanese Baseball Hall of Fame in 1988.