Kim, born in South Hamgyong Province of Korea, was taken to Japan before twenty and became a Sumo (traditional Japanese wrestling) player. He began pro-wrestling in Juche 39 (1950) in Japan.

During those days, he was enraged at the denigration against the Korean nation. His repulsion and resentment against it made him exercise Herculean power in matches.

His strong will and powerful karate chop brought many world pro-wrestling aces to their knees.

He won victories 295 times in over 300 local and international pro-wrestling matches.

An American pro-wrestling ace, alias Destroyer, who had the last match with Kim, praised him as the best pro-wrestler, saying that whatever others may say, there have been and will be no equals to him.

He was murdered in Japan on December 15, 1963.

President Kim Il Sung, deeply grieved over his death, saw to it that the title of Martyr was awarded to Kim Sin Rak as he had firmly preserved a soul and conscience of a Korean in the alien land for a long time.