Delusion:All

"Delusion:All" is a song by Japanese rock band One Ok Rock from their upcoming eleventh studio album, released as a single by Fueled by Ramen on July 12, 2024. Written by Takahiro Moriuchi, Jason Alon, Dan Lancaster and Tyler Carter, and produced by Lancaster and Rob Cavallo, the song serves as the theme for Japanese historical war film Kingdom 4: Return of the Great General (2024).

Background and release
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". The song was released concurrently alongside the film on July 12, 2024.

Composition
"Delusion:All" is described as a rock track with theme of "disillusionment and skepticism towards societal and political systems." According to the band's lead vocalist Takahiro Moriuchi at the press release, the song depicts the "the various conflicts in the world and the current historical background [of the film]."

Music video
An accompanying music video for "Delusion:All" premiered on July 12, 2024, at 22:00 JST on the band's YouTube channel. Directed by Taichi Kimura, the visual expresses the civil unrest and the indifference of the affluent.

Credits and personnel

 * One Ok Rock
 * Taka – vocals, songwriter
 * Toru – guitar
 * Ryota – bass
 * Tomoya – drums
 * Dan Lancaster – background vocals, songwriter, producer, guitar, programming
 * Tyler Carter – songwriter, recording
 * Jason Alon – songwriter
 * Rob Cavallo – producer
 * MEG – recording
 * Zakk Cervini – mixing
 * Julian Gargiulo – assistant
 * Vlado Meller – mastering