Yasu San comments

This game is totally different from high school game. Instead, this is war game that needs much tactics and practice. Before WWII, midshipmen in Naval Academy in Etazima, Hishorhima played this game. When I played as a cadet in National Defense Academy 30 years ago, we could hit and kick their face without any limitation (full contact) and we did not wear the face gear. Cadets who belong to Karate Club could not attend the game. However, people who belong to boxing club and Kyokusin Karate in private city club could attend. Some Kyokushin karate cadets played very roughly. Since more than fifty cadets were injured and hospitalized in some year, full contact was limited after that.