Wrestle Peter Pan 2021 was a professional wrestling event promoted by CyberFight's sub-brand DDT Pro-Wrestling (DDT). It took place on August 21, 2021, in Kawasaki, Japan, at the Fujitsu Stadium Kawasaki. The event aired live on CyberAgent's AbemaTV online linear television service and CyberFight's streaming service Wrestle Universe. This was the thirteenth event in the Peter Pan series and the third promoted under the "Wrestle Peter Pan" name. This edition was also the first to take place outside of Tokyo.