The highest-selling albums and mini-albums in Japan are ranked in the Oricon Weekly Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each album's weekly physical sales. In 2006, 42 albums reached the peak of the charts.
Chart history Issue DateSongArtist(s)Reference(s)January 2Nameless WorldKobukuro January 16(Miss)understoodAyumi Hamasaki January 23Koichi Domoto Endless Shock Original Sound TrackKōichi Dōmoto January 30RibbonYuzu February 6AdultTokyo Jihen February 13Ai JibunhakuKreva February 20Sora Ippai ni Kanaderu InoriAqua Timez February 27OutgrowBoA March 6The Love RocksDreams Come True March 13CowardEndlicheri☆Endlicheri March 20Best: Second SessionKumi Koda March 27 April 3Best of KAT-TUNKAT-TUN April 10AsiaExile April 17Cycle Hit 1991-1997 Spitz Complete Single CollectionSpitz April 24ConfidenceHY May 1 May 8Catch the WaveDef Tech May 15 May 22Stadium ArcadiumRed Hot Chili Peppers May 29HorizonRemioromen June 5 June 12 June 191000000000000T.M. Revolution June 26Ultra BlueHikaru Utada July 3 July 10MonsterB'z July 17ArashicArashi July 24SpecialityNami Tamaki July 31GaryūsenpūMegaryu August 7Pop Up! SMAPSMAP August 14Very Best IIV6 August 21Crispy ParkEvery Little Thing August 28Beautiful Songs: Kokoro de Kiku UtaVarious Artists September 4KanojoAiko September 11Shōnan no Kaze: Riders HighShōnan no Kaze September 18WaveYuki September 25MirrorKōichi Dōmoto October 2Live Goes OnSeamo October 9All Singles BestKobukuro October 16 October 23 October 30 November 6Golden Best: 15th AnniversaryZard November 13First MessageAyaka November 20Eleven Fire CrackersEllegarden November 27Stop the ClocksOasis December 4All the BestChemistry December 11SecretAyumi Hamasaki December 185 Nen MonoMasaharu Fukuyama December 25I Album: IDKinKi Kids
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