This was from the 1st World Tournament. The Wing Chun practitioners are in black, they had decided to test their art against a full-contact style back in the 70s. No information currently available on who the two Wing Chun stylists were.
The Kyokushin fighter is Joko Ninomaya, who later on went to form Enshin Karate and the Sabaki Challenge. Joko later commented in his autobiography that the Wing Chun stylists spent too much time on their forms and not enough on practical applications of their techniques.