Tomonari Sora debuts explosive track for Assassination Classroom reboot
Tomonari Sora, acclaimed for his poetic lyricism and experimental sound, has unveiled his latest single “CAUTION 黄色信号,” the official opening theme for the re-broadcast of the fan-favorite anime series Assassination Classroom. The track was digitally released on April 9, 2025.
Infused with aggressive beats and pulsating energy, “CAUTION” encapsulates the fleeting and emotionally charged nature of adolescence. Taking inspiration from the “yellow light” of a traffic signal—a symbol of transition and urgency—the track reflects the turbulent phase between childhood and adulthood.
“The track embodies the sense of moving fast, like the moments in youth that slip by before you realize,” said Tomonari Sora, who not only wrote, composed, and arranged the song but also handled mixing and artwork personally. His signature wordplay and metaphor-rich lyricism are again on full display, following a string of critically praised singles such as “Demons Banquet,” “ACTOR,” and “Bergamot.”
The soundscape of “CAUTION” is packed with high-speed drum progressions, sharp transitions, and layered vocals that mirror the frantic energy found in the animated world of Assassination Classroom. As the series revisits its high-stakes story of teacher versus students, Tomonari’s new theme song perfectly aligns with its underlying tone of urgency, growth, and rebellion.
“CAUTION 黄色信号” represents another evolution in Tomonari Sora’s already boundary-pushing artistry, and with his complete control over the track’s creative direction, the release underscores his rising status as one of Japan’s most multifaceted young musicians.
