Japanese swordsmanship, among many other sports, is one of the typical games which require quick reaction to the visual stimuli. We have classified examinees into two groups; one, those who have gone through the periodic training in swordsmanship, concentration both in mind and body, and quick motion, the other, those who have never 　taken any special exercise. And we examined the past achievements of the one-group examinees and the other-group examinees during the past four or five years in their boyhood between the third-year primary school days arid the third-year junior high school days. As a result of our comparative analysis of these data, we can here verify some effectiveness of training in reducing total body reaction time, movement time, responsive time, and even simple 　reaction time.