Top 100 singles sales in Japan 2005 according to Oricon from December 1, 2004 to November 21, 2005.

{| class=wikitable
|-
! Rank || Artist || Single || Date || Sales
|-
| 1 || Shuji to Akira || Seishun Amigo || 2005-11-02 || 945,315
|-
| 2 || Ketsumeishi || Sakura || 2005-02-16 || 942,675
|-
| 3 || Mr. Children || Four Dimensions || 2005-06-29 || 924,379
|-
| 4 || ORANGE RANGE || Asterisk || 2005-02-23 || 628,329
|-
| 5 || GLAY x EXILE || SCREAM || 2005-07-20 || 537,258
|-
| 6 || KinKi Kids || Anniversary || 2004-12-22 || 525,905
|-
| 7 || B'z || Ocean || 2005-08-10 || 505,035
|-
| 8 || ORANGE RANGE || Love Parade || 2005-05-25 || 447,393
|-
| 9 || Toraji Haiji || FANTASTIPO || 2005-01-26 || 427,043
|-
| 10 || Mika Nakashima || GLAMOROUS SKY || 2005-08-31 || 420,651
|-
| 11 || ORANGE RANGE || Onegai! Senorita || 2005-06-08 || 417,464
|-
| 12 || ORANGE RANGE || Kizuna || 2005-08-24 || 410,307
|-
| 13 || D-51 || NO MORE CRY || 2005-02-02 || 401,461
|-
| 14 || SMAP || BANG!BANG! VACANCE || 2005-07-27 || 396,316
|-
| 15 || Kobukuro || Kokonishika Sakanai Hana || 2005-05-11 || 374,633
|-
| 16 || Southern All Stars || Ai to Yokubo no Hibi/Lonely Woman || 2005-07-20 || 371,706
|-
| 17 || SMAP || Tomodachi ~Say What You Will~ || 2005-01-19 || 365,011
|-
| 18 || BENNIE K || Dreamland || 2005-06-08 || 348,256
|-
| 19 || Ayumi Hamasaki || STEP you/is this LOVE? || 2005-04-20 || 345,340
|-
| 20 || Yuna Ito || ENDLESS STORY || 2005-09-07 || 345,112
|-
| 21 || ORANGE RANGE || Hana || 2004-10-20 || 338,147
|-
| 22 || Janne Da Arc || Gekkouka || 2005-01-19 || 321,977
|-
| 23 || Ayumi Hamasaki || HEAVEN || 2005-09-14 || 320,591
|-
| 24 || KinKi Kids || Velvet no Yami || 2005-06-15 || 315,930
|-
| 25 || Ayumi Hamasaki || fairyland c/w alterna || 2005-08-03 || 316,663
|-
| 26 || Ai Otsuka || SMILY/Biidama || 2005-05-11 || 308,388
|-
| 27 || B'z || Ai no Bakudan || 2005-03-09 || 293,572
|-
| 28 || Under Graph || Tsubasa || 2004-09-24 || 290,571
|-
| 29 || Tongari Kids || B-DASH || 2005-03-16 || 290,369
|-
| 30 || Crystal Kay || Koi ni Ochitara || 2005-05-18 || 288,629
|-
| 31 || Ken Matsudaira || Matsuken Samba II || 2004-07-07 || 278,989
|-
| 32 || NEWS || CHERISH || 2005-03-16 || 261,584
|-
| 33 || Southern All Stars || BOHBO No.5 || 2005-07-20 || 259,109
|-
| 34 || NEWS || TEPPEN || 2005-07-13 || 242,322
|-
| 35 || BUMP OF CHICKEN || Planetarium || 2005-07-21 || 241,423
|-
| 36 || Kanjani 8 || Sukiyanen, Osaka./Oh! ENKA/Mugendai || 2005-09-14 || 236,096
|-
| 37 || L'Arc~en~Ciel || LINK/Promise Land 2005 || 2005-07-20 || 235,751
|-
| 38 || Porno Graffiti || Neo Melodramatic/ROLL || 2005-03-02 || 227,819
|-
| 39 || Kiyoshi Hikawa || Hatsukoi Ressha || 2005-02-09 || 224,413
|-
| 40 || HIGH and MIGHTY COLOR || PRIDE || 2005-01-26 || 223,208
|-
| 41 || Ai Otsuka || Planetarium || 2005-09-21 || 215,114
|-
| 42 || Hirahara Ayaka || Jupiter || 2003-12-17 || 214,098
|-
| 43 || AI || Story || 2005-05-18 || 211,682
|-
| 44 || aiko || Kira Kira || 2005-08-03 || 206,658
|-
| 45 || Ken Hirai || POP STAR || 2005-10-26 || 198,409
|-
| 46 || Masaharu Fukuyama || Naitari Shinaide/Red x Blue || 2004-12-01 || 196,667
|-
| 47 || EXILE || EXIT || 2005-08-24 || 195,004
|-
| 48 || Gorie with Jasmine & Joann || Pecori Night || 2005-09-14 || 194,514
|-
| 49 || L'Arc~en~Ciel || Killing Me || 2005-01-13 || 193,772
|-
| 50 || DREAMS COME TRUE || Nandodemo || 2005-02-16 || 191,366 |-
|-
| 51 || L'Arc~en~Ciel || New World || 2005-05-06 || 183,181
|-
| 52 || EXILE || HERO || 2004-12-01 || 181,997
|-
| 53 || Arashi || WISH || 2005-11-16 || 177,528
|-
| 54 || T.M. Revolution || vestige || 2005-08-17 || 176,028
|-
| 55 || ARASHI || Sakura Sake || 2005-03-23 || 172,737
|-
| 56 || Fukuyama Masaharu || Tokyo || 2005-08-17 || 171,804
|-
| 57 || BoA || DO THE MOTION || 2005-03-30 || 169,542
|-
| 58 || K || over... || 2005-03-02 || 167,925
|-
| 59 || V6 || UTAO-UTAO || 2005-06-22 || 162,850
|-
| 60 || Gackt || Metamorphoze || 2005-05-25 || 156,709
|-
| 61 || Every Little Thing || koibumi/goodnight || --- || 156,512
|-
| 62 || See-Saw || Kimi wa Boku ni Niteiru || --- || 156,172
|-
| 63 || Sasuke || Aoi Benchi || --- || 155,915
|-
| 64 || Mi || Mirai no Chizu || --- || 154,080
|-
| 65 || GLAY || White Road || --- || 151,201
|-
| 66 || Ai Otsuka || Kuroge Wagyu Joshio Tanyaki 680 Yen || --- || 149,134
|-
| 67 || L'arc en Ciel || Jojoshi || --- || 145,718
|-
| 68 || CHEMISTRY || Wings of Words || --- || 140,969
|-
| 69 || Ryu Siwon || Sakura || --- || 139,288
|-
| 70 || BoA || Meri Kuri || --- || 136,725
|-
| 71 || Bokutachi no Yukue || Takahasi Hitomi || --- || 135,989
|-
| 72 || Utada Hikaru || Be My Last || 2005-09-28 || 129,771
|-
| 73 || Sukimasuicchi || Zenryoku Shounen || --- || 126,712
|-
| 74 || melody. || realize/Take a Chance || --- || 125,355
|-
| 75 || Sambomaster || Sekai Wa Sore Wo Ai To Tobundaze || --- || 124,888
|-
| 76 || tackey & tsubasa || kamen / mirai kokai || --- || 124,344
|-
| 77 || sharin no uta || BUMP OF CHICKEN || --- || 121,960
|-
| 78 || melody. || realize / Take a Chance || --- || 126,338
|-
| 79 || Hitoto Yo || Hanamizuki || --- || 121,409
|-
| 80 || Mika Arisaka || Life Goes On || --- || 119,841
|-
| 81 || Yuka Hata || Gita Samurai no Uta || --- || 119,533
|-
| 82 || Koda Kumi || Butterfly || --- || 118,738
|-
| 83 || Ai Otsuka || Sakuranbo || --- || 118,350
|-
| 84 || Kimura Kaera || rirura riruha || --- || 117,299
|-
| 85 || Kiyoshi Hikawa || Omokage no Miyako || --- || 116,281
|-
| 86 || Porno Graffiti || NaNaNa Summer Girl || --- || 115,911
|-
| 87 || Mizumori Kaori || Gonosen || --- || 114,695
|-
| 88 || Kawanaka Miyuki || Usuyuki Gusa Kawanaka || --- || 113,370
|-
| 89 || m-flow loves YOSHIKA || let go || --- || 111,632
|-
| 90 || Ai Otsuka || Neko ni Fuusen || --- || 111,324
|-
| 91 || Kanjani 8 || Osaka Rainy Blues || --- || 110,284
|-
| 92 || Hirahara Ayaka || Ashita || --- || 109,578
|-
| 93 || YUI || feel my soul || --- || 107,930
|-
| 94 || Koda Kumi || flower || --- || 106,099
|-
| 95 || Mika Nakashima || Sakurairo Maukoro || --- || 105,631
|-
| 96 || Namie Amuro || WANT ME, WANT ME || --- || 102,733
|-
| 97 || UVERworld || D - technoLife || --- || 100,306
|-
| 98 || FLOW || DAYS || --- || 99,589
|-
| 99 || Shunsuke Kiyokiba || Itsuka... || --- || 97,270
|-
| 100 || Ami Suzuki || Delightful || --- || 97,218
|}

References

oricon.co.jp