On June 11, 2024, the Japanese historical war film Kingdom 4: Return of the Great General announced that One Ok Rock would be performed the film's theme song titled "Delusion:All". It is the second song by the band to feature on the film adaption of manga series Kingdom franchise since the 2019 first film with "Wasted Nights".[2] The song was released concurrently alongside the film on July 12, 2024.[3]
Composition
"Delusion:All" is described as a heavy rock track[4] with theme of "disillusionment and skepticism towards societal and political systems."[5] According to the band's lead vocalist Takahiro Moriuchi at the press release, the song depicts "the various conflicts in the world and the current historical background [of the film]."[6]
Music video
An accompanying music video for "Delusion:All" premiered on July 12, 2024, at 22:00 JST on the band's YouTube channel.[7] Directed by Taichi Kimura, the visual expresses the civil unrest and the indifference of the affluent.[5]