Resurgence was a professional wrestling pay-per-view (PPV) event produced by New Japan Pro-Wrestling (NJPW). It was held on August 14, 2021, at The Torch at LA Coliseum in Los Angeles, California. Wrestlers from U.S. partner promotions All Elite Wrestling (AEW), Impact Wrestling, Major League Wrestling (MLW), the United Wrestling Network's Championship Wrestling from Hollywood (CWFH), and Ring of Honor (ROH) appeared on the card.
In the main event, Hiroshi Tanahashi defeated Lance Archer to win the IWGP United States Heavyweight Championship. In other prominent matches, Jay White defeated David Finlay to retain the NEVER Openweight Championship, The Good Brothers (Doc Gallows and Karl Anderson) defeated Jon Moxley and Yuji Nagata, and Tomohiro Ishii defeated Moose.
Former IWGP World Heavyweight Champion Will Ospreay made an unannounced surprise appearance at the event announcing himself to be medically cleared to complete and yet out of the G1 Climax, calling current IWGP World Heavyweight Champion Shingo Takagi an “interim” champion and revealing a separate identical IWGP World Heavyweight Championship belt. He also announced himself to not be returning to Japan and instead said he would be competing on New Japan Pro-Wrestling of America (NJoA)'s streaming show, NJPW Strong.