The film is inspired by the hikeshi, firefighting groups organized in ancient Japan due to frequent fires taking place.
Johnny Yong Bosch's first Studio Trigger project since Kill La Kill (2014) released 5 years prior.
This is one of the last theatrical anime films with the 1967 MPAA logo in the credits.
The character of Galo is heavily inspired by Kamina from Gurren Lagann.
Mike Pollock (Deus Prometh) and Michael Sinterniklaas (Vinny) have also appeared in the Kirby anime series currently on separate occasions, Pollock was in Kirby: Right Back at ya (2001) as Mayor Len Blustergas, whilst Sinterniklaas was in the computer-animated short film Kirby 3D (2009) filling in for Andrew Rannells as Nightmare.