The disparity in the representation of Japanese men and women in sprint events at the Olympics could be attributed to a variety of factors.
One possible reason could be the historical and societal context of sports in Japan. Sport in Japan, like in many other places, is often coded as a masculine field. However, Japan has been making efforts to improve opportunities for elite female athletes, especially since the Olympic Games started including female events.
Another factor could be the nature of corporate sponsorship in Japan. There is extensive corporate sponsorship for a range of individual and team sports at elite levels for both male and female employees, which has opened up opportunities for women for intensive training and national and even international participation.
Moreover, the specific training and development programs for athletes in Japan might also play a role. For instance, the recent success of Japanese men in sprint events has been attributed to detailed analyses on velocity and technique combined with the tireless efforts by the sprinters and their coaches.
It’s also worth noting that the selection of athletes for specific events can be influenced by a variety of factors, including the athlete’s personal preference, coaching decisions, and strategic considerations based on the strengths and weaknesses of the athletes and their competitors.
However, these are just some possible explanations and the actual reasons could be more complex and multifaceted. It would be interesting to see how this trend evolves in future Olympic Games.