Kenshi Yonezu’s ‘IRIS OUT’ Dominates Japan Hot 100 for 11th Week! Chainsaw Man Theme Song Analysis (2026)

Hold onto your headphones, music fans! Kenshi Yonezu’s ‘IRIS OUT’ has reclaimed the No. 1 spot on Japan’s Hot 100 for an astonishing 11th week, solidifying its reign as a cultural phenomenon. But here's where it gets even more fascinating: this isn't just any song—it's the theme for The Chainsaw Man – The Movie: Reze Arc, and its resurgence comes with a surge in downloads (114%), streaming (102%), and video views (101%). And this is the part most people miss: despite falling just shy of 10 million combined streams outside Japan, it still dominates globally, holding the No. 1 spot on the Global Japan Songs Excl. Japan chart for 13 consecutive weeks. Is ‘IRIS OUT’ simply unstoppable, or is there more to its enduring appeal?

Meanwhile, the chart’s runner-up spot belongs to Bokuga Mitakatta Aozora’s ‘Are wa Fairy,’ the title track of their seventh single, which debuted with impressive CD sales of 120,035 copies. Panda Dragon’s ‘Winter Song Boeitai’ follows at No. 3, leading in sales with 131,384 copies but lacking support from other metrics. OCTPATH’s ‘Starlight Rendezvous’ rounds out the top 4, selling 85,717 copies. But here’s the controversial question: are sales-driven debuts truly reflective of a song’s popularity, or do they skew the chart’s representation of listener preferences?

Further down the chart, HANA’s ‘NON STOP’ slips to No. 5, while back number sees a surprising resurgence with 12 tracks re-entering the chart, including ‘Christmas Song’ (up 123% in total points) and the 2011 release ‘Shiawase,’ making its chart debut. Could this be a nostalgic wave, or is back number’s timeless appeal finally getting the recognition it deserves?

The Billboard Japan Hot 100, which combines physical and digital sales, streaming, radio airplay, video views, and karaoke data, continues to be a dynamic reflection of Japan’s diverse music landscape. What’s your take? Do these rankings align with your listening habits, or is there a hidden gem you think deserves more attention? Let’s spark a conversation in the comments!

Kenshi Yonezu’s ‘IRIS OUT’ Dominates Japan Hot 100 for 11th Week! Chainsaw Man Theme Song Analysis (2026)

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