G1 Supercard was a professional wrestling supershow co-produced by the American Ring of Honor (ROH) and Japanese New Japan Pro-Wrestling (NJPW) promotions. It was the 13th annual Supercard of Honor event and took place on April 6, 2019, at Madison Square Garden in New York City, New York. The event was streamed live on Honor Club, New Japan Pro-Wrestling World, FITE TV, and broadcast live on traditional pay-per-view outlets.
The card featured 12 matches. Both the IWGP Heavyweight Championship and ROH World Championship was defended on the card, as IWGP Champion Jay White defended against New Japan Cup winner Kazuchika Okada, while Survival of the Fittest winner Marty Scurll and Matt Taven wrestled for the ROH World Title against champion Jay Lethal in a ladder match. The event’s undercard saw two Winner Take All matches between NJPW and ROH champions, and UK partner promotion Revolution Pro Wrestling (RPW) had its top title – the British Heavyweight Championship – defended as well.