Oyama tested himself in a kumite, a progression of fights, each lasting two minutes, and each after the featured participant wins. Oyama devised the 100-man kumite which he went on to complete three times in a row over the course of three days.
He was also known for fighting bulls bare-handed. In his lifetime, he battled 52 bulls, three of which were purportedly killed instantly with one strike, earning him the nickname of “Godhand”. Many martial artists believe that the bulls he beat were at a disadvantage, because they were tamed and tied with nose rings and rope when Mas Oyama fought them.
Oyama had many matches with professional wrestlers during his travels through the United States. Oyama said in the 1958 edition of his book What Is Karate that he had just three matches with professional wrestlers plus thirty exhibitions and nine television appearances.