The purpose of this study was to examine the measures to prevent injuries and to improve performance of Kendo by analyzing injuries due to Kendo from practice condition and athletic specificity. The findings were collected from a survey by questionnaire on injuries due to Kendo. The following results were obtained. Thirty-eight out of forty-four Kendo players (college players) had experience in injuries due Kendo in the past. Most Kendo players were injuried in college. Most Kendo players were injuried during practice of Kendo (Jigeiko, Kakarigeiko, or Shiaigeiko) in the middle or the latter half at practice of Kendo. Most of injuries were myorrhexis, plasmotomy of the tendon, tendovaginitis, sprain, stress fracture, spondylolysis, lumbago and bruise. The higher occurence parts of injuries due to Kendo were ankle and wrist joints, the tendo calcaneus (Achilles), crus, thigh and regio lumbalis. Many injuries of crus, the tendon of Achiles and wrist joint were in the left, although injuries of ankle joint were in the right. Fiftysix percent of all injuries were caused by fatigue and the fatigue was occured by Tobikomi action, Suburi action, or Taiatari during Jigeiko and Kakarigeiko in the latter half at practice of Kendo. These were concluded that injuries due to Kendo can be prevented by master of correct Datotsu technique, the measure to fatigue, forming appropriate training plan and the systematization of staff for first aid and that the weight training to the higher occurence parts of injuries due to Kendo was needed for prevention of injuries and improvement in performance of Kendo.
