J-pop, Anime Songs and the Oricon Charts — 2026-10-11

The latest Oricon weekly charts (dated October 12) highlight a dominant week for idol and rock groups, with Hinatazaka46’s single "Icha Icha Mush" debuting at No. 1 with over 440,000 sales, while Mrs. GREEN APPLE’s album "POPS" claimed the top album spot with 646,000 units. In the anime sector, the Fall 2026 season is fully underway with major artists like YOASOBI and BUCK-TICK supplying theme songs, and K-pop group LE SSERAFIM secured a daily single ranking victory in Japan immediately upon release.

Top developments

Hinatazaka46 and Mrs. GREEN APPLE Lead Oricon Weekly Rankings

On October 6, Oricon announced that Hinatazaka46’s latest single "Icha Icha Mush" (イチャイチャ虫), released on September 30, debuted at No. 1 on the weekly single ranking with first-week sales of 442,000 copies. Simultaneously, rock band Mrs. GREEN APPLE’s album "POPS," also released on September 30, topped the weekly album chart with an impressive 646,000 first-week sales. These figures underscore the continued physical sales strength of major Japanese acts despite the streaming era's growth.

Fall 2026 Anime Season Themes Hit Karaoke and Streaming Platforms

The Fall 2026 anime season is driving significant activity in the music industry, with YOASOBI providing the opening theme "Adrenaline" (アドレナ) for the anime adaptation of Hanazakari no Kimitachi e (Hana-Kimi). Additionally, a comprehensive roundup by Mikiki by TOWER RECORDS highlights new theme songs from veteran and contemporary artists including BUCK-TICK, GLAY, aiko, Superfly, and MAN WITH A MISSION for various October broadcasts. These releases are quickly entering karaoke rotation, as noted by DAM’s updated listings which feature YOASOBI’s new tracks alongside other seasonal hits.

LE SSERAFIM Tops Daily Oricon Chart in Japan

K-pop group LE SSERAFIM achieved immediate success in Japan, topping the Oricon Daily Single Ranking on October 11, the day of their new release's launch. This rapid chart entry reflects the strong cross-border consumption of Asian pop music in Japan, where international groups frequently compete directly with domestic idol units for top positions.

Idol Group Graduations and Disbandments Announced

The idol sector saw several significant announcements this week. The group "Buttobi! Pandemic" announced it will disband following a final performance at Shinjuku ReNY on December 30, 2026. Additionally, member Nakagawa Rikako of I'mew announced her graduation, scheduled for a final show on March 24, 2027. These events mark the end of eras for smaller indie idol groups, contrasting with the stable dominance of major label idols like Hinatazaka46.

Local view

Japanese media outlets are closely tracking the "battle" between physical sales giants and streaming trends. Sankei News highlighted Hinatazaka46’s sales figures as a testament to the group's loyal fanbase, noting the specific release date and label (Sony Music Records) to contextualize the achievement within the idol industry's competitive landscape. Meanwhile, specialized anime and music portals like Animatetimes and Mikiki are focusing on the synergy between anime broadcasts and music consumption, highlighting how theme songs drive engagement through karaoke and digital downloads.

Context & numbers

• Oricon Weekly Single Sales: Hinatazaka46’s "Icha Icha Mush" sold 442,000 copies in its first week.
• Oricon Weekly Album Sales: Mrs. GREEN APPLE’s "POPS" sold 646,000 copies in its first week.
• Chart Dates: The rankings discussed are for the week of September 28 – October 4, 2026, published as the October 12-dated charts.

On the radar

• Fall Anime Theme Releases: Monitor the streaming performance of YOASOBI’s "Adrenaline" and other Fall 2026 OP/EDs as they enter the Billboard Japan Hot 100 and Oricon Streaming charts in the coming weeks.
• Idol Graduation Season: Keep an eye on upcoming graduation announcements from major idol groups, as autumn often sees a cluster of member departures and lineup changes ahead of year-end tours.