The writers cite the Kingsman films as an influence on the story.
The writers consider their favourite power to be the Marble Rumble ability.
The project's theme is poker, with everything from the title to the names of fictional locations referencing some form of playing card game.
The first episode received an early screening on November 19, 2022 at Anime NYC in the United States. Further, the first two episodes received an early screening at a special event on December 12, 2022 at Grand Cinema Sunshine Ikebukuro in Tokyo. The regular TV broadcast started on January 9, 2023.
High Card (stylized in all caps) is a Japanese multimedia franchise created by Homura Kawamoto, Hikaru Muno, and TMS Entertainment. It consists of a manga series, a novel series, drama CDs, and an anime television series.