Masutatsu Ōyama more commonly known as Mas Oyama was a Zainichi Korean karate master who founded Kyokushin Karate; considered the first and most influential style of full contact karate. 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 barehanded. He battled 52 bulls over the course of his lifetime supposedly cutting off the horns of several and killing three instantly with one strike earning him the nickname of "Godhand". Oyama is said to have had many matches with professional wrestlers during his travels through the United States. Oyama built his Tokyo-based International Karate Organization Kyokushinkaikan into one of the world's foremost martial arts associations with branches in more than 100 countries boasting over 12 million registered members. In Japan books were written by and about him; feature-length films splashed his colorful life across the big screen and manga recounted his many adventures.