国際プロレス
After Rikidōzan’s death in 1963, the company continued to operate as the nation’s premier (and only male) wrestling circuit until challenged in the late 1960s by International Wrestling Enterprise, which featured the first major World heavyweight championship based in Japan, the IWA title. The JWA's top stars, Giant Baba and Antonio Inoki left to form their own promotions (All Japan Pro Wrestling and New Japan Pro-Wrestling, respectively) in 1972. With its top drawing cards gone, the JWA was therefore out of business the following year.