All Japan Pro Wrestling have announced that the participants in the 2021 AJPW Champion Carnival Tournament are Kento Miyahara, Shuji Ishikawa, Jake Lee, Yuma Aoyagi, Koji Doi, Shotaro Ashino, Shinjiro Otani, Kohei Sato, Zeus and Suwama.

The 2020 Champion Carnival was initially cancelled last year, due to COVID-19, however the company announced that it would then take place in September, with the tournament won by Zeus, who defeated 2019 Champion Carnival winner Kento Miyahara in the finals.