In May 1963, two of the recently introduced FE-powered Suzuki Frontes came in first and second in their class at the inaugural Japanese Grand Prix (Class C1, for engines with less than 400 cc), with an average speed of . Two more Frontes came in fourth and eighth places. The winning driver was Osamu Mochizuki (望月 修) who crossed the finish line just ahead of teammate Haruhisa Fujita (藤田 晴久), both a full minute ahead of the third-placed Subaru 360. The fastest lap was also made by a Fronte, by eighth-place finisher Isamu Kawashima, who managed a lap speed of around the course.