WCW/New Japan Supershow I, was a professional wrestling pay-per-view (PPV) event that took place on March 21, 1991, in the Tokyo Dome in Tokyo, Japan. It was co-promoted by New Japan Pro-Wrestling (NJPW), who hosted the event, and the US-Based World Championship Wrestling (WCW), which supplied a number of the wrestlers on the show. The event was the inaugural WCW/New Japan Supershow.