WCW/New Japan Supershow II took place on January 4, 1992, from the Tokyo Dome in Tokyo, Japan. The show was the first NJPW January 4 Dome Show, something that would become an annual tradition in NJPW and would become their biggest show of the year. The show was also the second under the name WCW/New Japan Supershow. The show was broadcast on pay-per-view (PPV) months later in America. The US PPV broadcast did not include several of the matches of the 12-match show, with only six being broadcast in America out of a total of twelve matches.

The IWGP Heavyweight Championship was a professional wrestling world heavyweight championship owned by the New Japan Pro-Wrestling (NJPW) promotion. "IWGP" is the acronym of NJPW's governing body, the International Wrestling Grand Prix . The title was introduced on June 12, 1987, in the final of an IWGP tournament. It was unified with the IWGP Intercontinental Championship on March 4, 2021, to form the new IWGP World Heavyweight Championship.