Kenshi Yonezu’s “IRIS OUT” logs its second week atop the Billboard Japan Hot 100, on the chart released Oct. 1.
The CD version of the theme for Chainsaw Man – The Movie: Reze Arc dropped on Sept. 24, following its digital release on Sept. 15. The track rules video views and streaming, hits No. 3 for sales (255,534 weekly copies) and No. 2 for downloads (20,374 units), while also coming in at No. 11 for radio and No. 12 for karaoke.
Overall, the song earned 29,533 points — the highest since 2023, when the current six-metric system was introduced.
Top 5 Songs with Most Weekly Total Points Since 2023 on Japan Hot 100
29,533 pts. — “IRIS OUT” Kenshi Yonezu (Chart released Oct. 1, 2025)
24,360 pts. — “Idol” YOASOBI (June 28, 2023)
23,582 pts. — “Idol” YOASOBI (May 10, 2023)
23,453 pts. — “Bling-Bang-Bang-Born” Creepy Nuts (March 20, 2024)
23,212 pts. — “Idol” YOASOBI (May 3, 2023)
Additionally, “IRIS OUT” reached No. 5 on the U.S. Billboard Global 200 chart dated Oct. 4, 2025 — the highest position ever for a Japanese-language song. Chainsaw Man – The Movie: Reze Arc opened in Japan on Sept. 19 and is now heading to theaters worldwide, with France set for Oct. 22, followed by the U.S. and U.K. on Oct. 29. The international rollout is expected to fuel even greater global momentum for the theme song as well.
Yonezu dominates the top 2 slots this week, with his collaborative track with Hikaru Utada, “JANE DOE,” debuting at No. 2. The track serves as the ending theme for the same movie and marks the first-ever collaboration between the two J-pop hitmakers. Released digitally on Sept. 22, the track launches at No. 1 for downloads with 33,048 units, while hitting No. 2 for streaming (13,730,958 streams) and video, and No. 6 for radio airplay.
Several other songs by Yonezu rebounded on the Japan Hot 100: “Plazma” climbs 43-32, “KICK BACK” 94-53, “BOW AND ARROW” 65-61, and “Lemon” re-enters for the first time in about four months.
Bowing at No. 3 is Bullet Train’s “NINE LIVES,” which scored the group’s highest-ever first-week sales with 416,904 copies. The track tops sales and hits No. 2 for radio, No. 9 for streaming, No. 49 for downloads, and No. 99 for video. Following at No. 4 on the Japan Hot 100 is SKE48’s “Karma.” The girl group’s 35th single sold 317,180 copies in its first week to launch at No. 2 for sales and is at No. 93 for radio.
The Billboard Japan Hot 100 combines physical and digital sales, audio streams, radio airplay, video views and karaoke data.
See the full Billboard Japan Hot 100 chart, tallying the week from Sept. 22 to 28, here. For more on Japanese music and charts, visit Billboard Japan’s English X account.
