FLOW’s official YouTube channel is streaming the music video for “UNSTOPPABLE,” the opening theme for Reborn as a Space Mercenary: I Woke Up Piloting the Strongest Starship!. The song was released digitally on October 5, after the anime’s Japanese debut on October 4, 2026. For FLOW’s comments on the track, see the report: Crunchyroll News reports on the video’s release and the band’s comments about its composition.
FLOW adds retro-game sounds to the opening theme
FLOW says it included sounds intended to catch the attention of listeners from the Famicom generation and retro-game fans, connecting that approach to the series’ shoot ’em up elements.
Crunchyroll streams the anime for members worldwide except in Japan, China, Korea and Mongolia. Those regional limits describe the anime’s distribution, not the music video’s availability.
