Complex sentence: After joining the Japan Pro Wrestling Alliance in 1960, he started the circuit in Los Angeles in 1966 and joined International Pro Wrestling in 1974, where he held the IWA World Heavyweight Championship from June 10,1976 till July 28,1976.
Split into simpler sentences: After joining the Japan Pro Wrestling Alliance in 1960, he started the circuit in Los Angeles in 1966. In 1974, he joined Japan's International Pro Wrestling, where he held the IWA World Heavyweight Championship from June 10,1976, till July 28,1976.