The following is a list of weekly number-one albums on the Billboard Japan Hot Albums chart in 2021.
Chart history Issue dateSongArtist(s)Ref.January 4O AlbumKinKi KidsJanuary 11 Arashi January 18 1ST SixTones January 25Straight Outta Rhyme AnimaHypnosis Mic: Division Rap BattleFebruary 1Still DreamingTomorrow X TogetherFebruary 8ColonFebruary 15Live LoudThe Yellow MonkeyFebruary 22Sekai no Owari 2010-2019Sekai no OwariMarch 1LoveholicNCT 127March 8Hypnosis Mic: Division Rap BattleMarch 15SZ10thSexy ZoneMarch 22One Last KissHikaru UtadaMarch 29rainboWJohnny's WestApril 5ヒプノシスマイク -Division Rap Battle- 2nd Division Rap BattleFling Posse vs. Mad Trigger CrewApril 12The First Step: Treasure EffectTreasureApril 19超特急 ≠ME行き≠MeApril 26WalpurgisAimerMay 3BeBTSMay 10Border: CarnivalEnhypenMay 17Flavors of LoveMonsta XMay 24Zenbu, Naisho." (全部、内緒。)=LoveMay 31LadybugLiSAJune 7 Demon Slayer: Kimetsu no Yaiba – Tanjiro Kamado Risshi-hen Original Soundtrack Various artistsJune 14 Playful Koichi DomotoJune 21 The Chaos Chapter: Freeze Tomorrow X TogetherJune 28 BTS, the Best BTSJuly 5July 12July 19 L∞ve UrashimasakatasenJuly 26 Butter BTSAugust 2 Re:Sense King & PrinceAugust 9Perfect WorldTwiceAugust 16 Going to Destruction BishAugust 23 Best of Kis-My-Ft2 Kis-My-Ft2August 30 Editorial Official Hige DandismSeptember 6 Go to Funk EndrecheriSeptember 13 Step V6September 20 Hypnosis Mic: Division Rap Battle – 2nd D.R.B: Buster Bros!!! VS Matenro VS Fling Posse Hypnosis Mic: Division Rap BattleSeptember 27Gohan Misoshiru Nori Otsukemono Tamagoyaki feat. UmeboshiKeisuke KuwataOctober 4October 11Snow Mania S1Snow ManOctober 18October 25 Dimension: Dilemma EnhypenNovember 1 Attacca SeventeenNovember 8 Very6 Best V6November 15 Attacca SeventeenNovember 22 Chaotic Wonderland Tomorrow X TogetherNovember 29 8beat Kanjani EightDecember 6 U NiziUDecember 13The Book 2YoasobiDecember 20 Friends III B'zDecember 27 Time Flies Nogizaka46
See also List of Hot 100 number-one singles of 2021
References