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.
All Japan Pro Wrestling
On August 10, 2000, All Japan mainstay Masanobu Fuchi walked into the New Japan Pro Wrestling ring and declared that his intention was to "break down the walls" between All Japan and New Japan. In response, New Japan foreman Riki Choshu rushed into the ring and exchanged a firm handshake with Fuchi, signaling the beginning of the cross-promotional alliance. On September 16, 2000, Toshiaki Kawada followed Fuchi's path and vowed to crush New Japan ace Kensuke Sasaki, as he defeated Sasaki in the Tokyo Dome on October 9, 2000; the event sold out the building. In 2001, Keiji Mutoh and Shinjiro Otani created the interpromotional stable BATT (Bad Ass Translate Trading), which included All Japan's Taiyō Kea, Michinoku Pro's Jinsei Shinzaki and Hiroshi Hase. During this time, Mutoh challenged and defeated Tenryu for the Triple Crown Heavyweight Championship, as well as capturing the World Tag Team Championship with Taiyō Kea. The alliance between the promotions lasted until January 11, 2002.