Touhou Spell Carnival was announced in October 2023 as one of seven titles in development by
Compile Heart, which was going under transition to a new management structure at the time. It was developed in cooperation with
Sting. The game features character illustrations by Katsuyuki Hirano. Compile Heart opened up an official website in November 2023. The game was initially scheduled to be released in Japan 18 April, but it was delayed to 6 June.
Idea Factory International published the Western release on 19 November 2025. The game was released both physically and digitally, but the physical release in Europe was released on 3 December. The Digital Deluxe Edition includes a digital art book and soundtrack. The Windows port was released on 7 May 2025 worldwide for
Steam. In addition to the regular version and the Digital Deluxe Edition, Idea Factory International manufactured a Limited Edition that include Reimu and Marisa figures. ==Notes==