Aniplex announced Aimer and LiSA will perform the theme songs for the first Demon Slayer -Kimetsu no Yaiba- Infinity Castle film, which is being listed with the subtitle Akaza Sairai (The Return of Akaza). Aimer performs the theme song “Taiyō ga Noboranai Sekai (A World Where the Sun Never Rises),” while LiSA performs the song “Zankoku no Yoru ni Kagayake (Shine in the Cruel Night).” Their singles will be released on July 19.

The first film in the Demon Slayer: Kimetsu no Yaiba Infinity Castle trilogy premieres on July 18 in Japan. It will play on 443 screens through Japan, setting a new record for the franchise. The film will come to the US and Canada on September 12.
Here are the theatrical dates for the first Demon Slayer: Kimetsu no Yaiba Infinity Castle film:
- August 14: Malaysia, Pakistan, Singapore
- August 15: Cambodia, Indonesia, Vietnam
- August 20: Philippines
- September 11: Argentina, Armenia, Australia, Azerbaijan, Bahrain, Bolivia, Brazil, the Caribbean (Jamaica, Aruba, Suriname, Trinidad & Tobago, Curacao), Central America, Chile, Colombia, Croatia, Czech Republic, Denmark, Dominican Republic, Ecuador, Egypt, Ethiopia, Georgia, Greece, Hungary, Iceland, Iraq, Israel, Italy, Jordan, Kazakhstan, Kuwait, Lebanon, Lithuania, Macedonia, Mexico, Netherlands, New Zealand, Oman, Paraguay, Peru, Portugal, Qatar, Saudi Arabia, Serbia, Slovakia, Slovenia, Switzerland (Italian-speaking), Syria, Thailand, Ukraine, United Arab Emirates, Uruguay, Venezuela
- September 12: Bulgaria, Canada, Estonia, Finland, India, Kenya, Latvia, Mongolia, Nigeria, Norway, Poland, Romania, Southern Africa, Spain, Sweden, Turkey, United Kingdom, United States
- September 17: Belgium, France, French-speaking Africa, Luxembourg, Switzerland (French-speaking)
- September 18: Moldova
- September 25: Austria, Germany, Switzerland (German-speaking)
Lastly, Demon Slayer: Kimetsu no Yaiba is streaming on Crunchyroll.