Champion Carnival
From 1959 to 1972, the Japan Pro Wrestling Alliance (JWA), run by Rikidōzan, held a tournament called World League (also known as the "World Big League"), which featured both Japanese and foreign professional wrestlers. Rikidōzan himself dominated the annual tournament early on, however, after his death in 1963, the tournament was won six times by Giant Baba and once by Antonio Inoki. JWA folded shortly after both Baba and Inoki left the promotion to create All Japan Pro Wrestling (AJPW) and New Japan Pro-Wrestling (NJPW), respectively. Both men took the concept of World League with them to their new promotions, with Baba creating the "Champion Carnival" in 1973 and Inoki creating the World League in 1974, later renaming it G1 Climax.
WCW/New Japan Supershow I
WCW/New Japan Supershow I, (known as Starrcade in Tokyo Dome in Japan) was a professional wrestling pay-per-view (PPV) event that took place March 21, 1991 from the Tokyo Dome in Tokyo, Japan, co-promoted by New Japan Pro Wrestling (NJPW), who hosted the event and the US-Based World Championship Wrestling (WCW) that supplied a number of the wrestlers on the show. The event was the inaugural WCW/New Japan Supershow.