# December 2026 K-pop comeback dates: NMIXX's Japanese debut album on Dec. 9, year-end stages from Dec. 5

> Source: https://hallyu.wiki/en/guides/kpop-comebacks-2026-12/
> Publisher: Hallyu Wiki (explainer, original writing with cited sources)
> Published: 2026-10-23 · Last updated: 2026-10-23
> Cite as: "December 2026 K-pop comeback dates: NMIXX's Japanese debut album on Dec. 9, year-end stages from Dec. 5", Hallyu Wiki, https://hallyu.wiki/en/guides/kpop-comebacks-2026-12/

As of Oct. 23, one release with an officially announced December date, plus one expected in December without an announced date, and where they meet December's AAA, Music Bank shows in Japan and SBS Gayo Daejeon, drawn from 16 press reports. The third in a monthly series, to be updated as dates are announced.

As of Oct. 23, 2026, one K-pop release has an officially announced December date: NMIXX releases its Japanese debut best-of album N=MIXX on Wednesday, Dec. 9. JYP Entertainment announced the date on July 31; the album has 12 tracks, including "Blue Valentine" and Japanese versions of earlier songs, and comes out through Warner Music Japan.

No other act had announced a December release date as of this writing. The band Hi-Fi Un!corn is continuing a monthly single project with a new song on the last Friday of each month, but no title or date has been announced for its December song. Most November dates were likewise announced two to six weeks before release. The table below lists only dates confirmed in press reports of agency announcements, with a source number on every entry.

| Release date | Title / format | Agency and notes |
|---|---|---|
| Dec 9 (Wed) | Japanese debut best-of album N=MIXX | JYP Entertainment; released in Japan by Warner Music Japan. Twelve tracks, including "Blue Valentine" and Japanese versions of earlier songs. Announced July 31. The group's Japan debut showcase in Nagoya follows on Dec. 12–13, three days after release. [1,2,3,4] |
| December (date not announced) | December song in the monthly digital single series H!dden Color (title not announced) | FNC Entertainment. A project releasing a new Korean-language song on the last Friday of each month since January; the ninth, "웃는다," came out on Sept. 25. The last Friday of December is Dec. 25, but no date or title has been announced for the December song. [5,6] |

## What is known about NMIXX's N=MIXX on December 9

NMIXX makes its official Japan debut on Dec. 9 with the best-of album N=MIXX. JYP Entertainment announced it on July 31, when pre-orders opened. The album has 12 tracks, including "Blue Valentine" and Japanese versions of earlier songs, and is released in Japan by Warner Music Japan. The group's Japan debut showcase, NMIXX JAPAN DEBUT SHOWCASE "N=MIXX," takes place before release on Nov. 7–8 at Yoyogi National Gymnasium First Gymnasium in Tokyo and after release on Dec. 12–13 at Kuroko-kun Hall (formerly Nippon Gaishi Hall) in Nagoya, Aichi Prefecture. The showcase dates were announced at the group's world-tour show at Keio Arena Tokyo on Aug. 9. [1,2,3,4]

## Expected in December without a date: Hi-Fi Un!corn's monthly single

FNC Entertainment's band Hi-Fi Un!corn launched its monthly digital single project H!dden Color with "라일라" on Jan. 30. The agency said the band would release a new Korean-language single on the last Friday of each month, and the ninth song, "웃는다," came out on Sept. 25. Under that rule the December song would fall on Friday, Dec. 25, but no report checked for this page announces a date or title for it, so the table lists it as "date not announced." [5,6]

## Where December plans meet year-end stages: AAA on Dec. 5–6, Music Bank in Japan on Dec. 12–13, SBS Gayo Daejeon on Dec. 24–25

- Dec. 5–6: AAA 2026 (Asia Artist Awards) at Kaohsiung National Stadium in Taiwan. The singer lineup announced by the organizers on Sept. 15 includes ATEEZ, RESCENE and LNGSHOT, all of which release new music in November. [9]
- Dec. 12–13: 2026 MUSIC BANK GLOBAL FESTIVAL IN JAPAN, organized by KBS and Any Corporation, at MUFG Stadium (National Stadium) in Tokyo. Kim Jae-won hosts both days, joined by Sana (MISAMO) on Dec. 12 and Jang Won-young (IVE) on Dec. 13. After a third lineup announcement on Oct. 16, Dec. 12 lists 12 acts including Nayeon, ATEEZ, aespa, RIIZE, TWS and NCT WISH, and Dec. 13 lists 13 including Stray Kids, IVE, LE SSERAFIM, xikers, BOYNEXTDOOR, ZEROBASEONE, RESCENE and CORTIS. NMIXX holds its Japan debut showcase in Nagoya on the same two days. [4,7,8]
- Dec. 24–25: the 30th-anniversary 2026 SBS Gayo Daejeon runs over two days for the first time, at KINTEX in Ilsan, Goyang. SBS released a 30th-anniversary concept poster on Oct. 21 and said the first lineup would be announced soon; no performers or hosts had been announced by then. Dec. 25, the date Hi-Fi Un!corn's monthly rule points to, is the show's second day. [6,10,11]
- No 2026 date or venue for the KBS Song Festival or MBC Gayo Daejejeon appears in the reports checked for this page. All award-show dates are collected in the separate guide on 2026 year-end award shows.

 [4,6,7,8,9,10,11]

## When November's dates were announced: a yardstick for reading December

Most dates in the November edition were announced two to six weeks before release: RESCENE (Nov. 3) on Sept. 22, TWS (Nov. 2) on Oct. 7, ATEEZ (Nov. 13) on Oct. 8, NCT DREAM (Nov. 9) on Oct. 16 and UNCHILD (Nov. 5) on Oct. 22. NMIXX's Dec. 9, announced more than four months ahead, is a Japanese release. On the same spacing, many early-December dates would be announced from late October onward, so the short December list as of Oct. 23 is not yet evidence of few December releases. [1,12,13,14,15,16]

## How to read this calendar

Only dates confirmed by press reports of agency notices or official social media are listed, each with its source number below. Hi-Fi Un!corn has announced only the project rule of releasing on the last Friday of each month, not a date for its December song, so it is listed at the end of the table as "date not announced." Japanese releases are included only for acts managed by Korean agencies. The release time for NMIXX's N=MIXX is not given in the reports checked. This page will be updated when new dates or titles are announced or a release is delayed. November's releases are in "November 2026 K-pop comeback dates" and October's in the October edition; the series continues monthly in the same format. [1,5,6]

## Sources

1. 헤럴드뮤즈, "엔믹스, 12월 9일 日정식 데뷔 확정..베스트 앨범 ‘N=MIXX’ 발매", 2026-07-31 — https://www.heraldmuse.com/article/10827129
2. 스포츠경향 (영문), "NMIXX to Debut in Japan After a Four-Year Voyage", 2026-07-31 — https://sports.khan.co.kr/en/article/202607311527007/
3. 오리콘 뉴스, "JYPの6人組ガールズグループ・NMIXX、12月9日に日本デビュー決定　ベストアルバム『N=MIXX』発売＆予約スタート", 2026-07-31 — https://www.oricon.co.jp/news/2471257/full/
4. Real Sound, "NMIXX、日本デビューショーケースライブを東京＆名古屋で開催　デビューアルバム収録曲を披露", 2026-08-12 — https://realsound.jp/2026/08/post-2489237.html
5. 미디어펜, "하이파이유니콘, 월간 프로젝트 가동…첫 곡은 '라일라'", 2026-01-30 — https://www.mediapen.com/news/view/1078353
6. 스포츠월드, "하이파이유니콘 히든 컬러 프로젝트 9번째 곡 ‘웃는다’ 발표", 2026-09-26 — https://www.sportsworldi.com/newsView/20260925508746
7. Kstyle, "国立競技場で12月に開催！「MUSIC BANK」日本公演、第1弾アーティストの出演日＆超豪華MCを発表", 2026-09-27 — https://kstyle.com/article.ksn?articleNo=2284494
8. Kstyle, "TWSからZEROBASEONE、TUIDEまで！12月開催の「MUSIC BANK」日本公演、第3弾アーティスト発表", 2026-10-16 — https://kstyle.com/article.ksn?articleNo=2285352
9. 스포츠경향 (영문), "‘Asia Artist Awards(Asia Artist Awards)’ Unveils Artist Lineups for Each Day", 2026-09-16 — https://sports.khan.co.kr/en/article/202609160040007
10. 일간스포츠, "‘SBS 가요대전’ 사상 최초 이틀간 개최…“30주년 기념”", 2026-10-01 — https://isplus.com/article/view/isp202610010202
11. 국악타임즈, "[국악타임즈] [2026 SBS 가요대전] 30주년 기념 새 컨셉 포스터 공개! 사상 최초 12월 24일-25일 양일 개최 확정", 2026-10-21 — https://www.gugaktimes.com/news/article.html?no=84070
12. 일간스포츠, "투어스, 11월 2일 싱글 2집 ‘투 어스’ 컴백…밀리언셀러 후 6개월 만", 2026-10-07 — https://isplus.com/article/view/isp202610070020
13. 스포츠경향 (영문), "‘sleeper-hit legend’ RESCENE to return on November 3", 2026-09-22 — https://sports.khan.co.kr/en/article/202609220729007/
14. 스포츠경향 (영문), "ATEEZ to carry on the ‘BAD’ craze…comeback confirmed for November 13", 2026-10-08 — https://sports.khan.co.kr/en/article/202610081046007
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16. 일간스포츠, "언차일드, 11월 5일 컴백 확정…7개월 만의 신보 발표", 2026-10-22 — https://isplus.com/article/view/isp202610220121