The History of JKF Renbukai Posted on September 19, 2018August 28, 2021 by bettinaishimaru All Japan Renbukai Official Website JKF RENBUKAI JKF RENBUKAI NEWS Important Historical Dates Bogu Strongman head gear is a superior sliding face mask (not a helmet) that is meant to shift slightly and move upon impact. Decreasing the impact felt on the head and neck. Share this:EmailMorePrintWhatsAppLike this:Like Loading...TweetPinShare22 Shares