They devised protective clothing and used kendo masks in their matches in order to utilize full contact .
In 1927 , three men , Miki , Bo and Hirayama decided that kata practice was not enough and tried to introduce Jiyu kumite ( free - fighting ) .
men devised protective clothing and used kendo masks in men 's matches in order to utilize full contact .
In 1927 , three men , Miki , Bo and Hirayama decided that kata practice was not enough and tried to introduce Jiyu kumite ( free - fighting ) .