-
KinKi Kids - Anniversary - 355,439 / 107,856
- 2 weeks (December 20, 2004 - January 9, 2005)
-
L'Arc ~ en ~ Ciel - Killing Me - 120.073
- 1 week (January 10th - January 16th)
-
SMAP - Tomodachi e: Say What You Will - 240,576
- 1 week (January 17th - January 23rd)
-
Toraji Haiji - Fantastipo - 202,200 / 68,846
- 2 weeks (January 24th - February 6th)
-
Hikawa Kiyoshi - Hatsukoi Ressha - 78,438
- 1 week (February 7th - February 13th)
-
Ketsumeishi - Sakura - 210,336
- 1 week (February 14th - February 20th)
-
Orange Range - *: Asterisk - 328.220 / 126.912
- 2 weeks (February 21st - March 6th)
-
B'z - Ai no Bakudan - 200.023
- 1 week (March 7th - March 13th)
-
NEWS - Cherish - 187.729
- 1 week (March 14th - March 20th)
-
Arashi - Sakura Sake - 115.114
- 1 week (March 21st - March 27th)
-
BoA - Do the Motion - 66,749
- 1 week (March 28th - April 3rd)
-
L'Arc ~ en ~ Ciel - New World - 131.181
- 1 week (April 4th - April 10th)
-
Takahashi Hitomi - Bokutachi no Yukue - 60,445
- 1 week (April 11th - April 17th)
-
Ayumi Hamasaki - Step You / Is This Love? - 164.008 / 68.977
- 2 weeks (April 18th - May 1st)
-
Tackey & Tsubasa - Kamen / Mirai Koukai - 75,703
- 1 week (May 2nd - May 8th)
-
Ai Ōtsuka - Smily / Biidama - 110,512
- 1 week (May 9th - May 15th)
-
L'Arc ~ en ~ Ciel - Jojoushi - 110,513
-
Orange Range - Love Parade - 223,534 / 80,340
- 2 weeks (May 23rd - June 5th)
-
Orange Range - Onegai! Señorita - 242062
- 1 week (June 6th - June 12th)
-
KinKi Kids - Veludo no Yami - 260.901
- 1 week (June 13th - June 19th)
-
V6 - Utao-Utao - 124,290
- 1 week (June 20th - June 26th)
-
Mr. Children - Four Dimensions - 569.116 / 141.107
- 2 weeks (June 27th - July 10th)
-
NEWS - Steppes - 180.289
- 1 week (July 11th - July 17th)
-
Glay x Exile - Scream - 305.795
- 1 week (July 18th - July 24th)
-
SMAP - Bang! Bang! Vacance! - 235.038
- 1 week (July 25th - July 31st)
-
Ayumi Hamasaki - Fairyland - 172.221
- 1 week (August 1st - August 7th)
-
B'z - Ocean - 264,925
- 1 week (August 8th - August 14th)
-
TMRevolution - Vestige - 121,599
- 1 week (August 15 - August 21)
-
Orange Range - Kizuna - 218,513
- 1 week (August 22nd - August 28th)
-
Nana Starring Mika Nakashima - Glamorous Sky - 120.202 / 90.709
- 2 weeks (August 29th - September 11th)
-
Ayumi Hamasaki - Heaven - 168,540
- 1 week (September 12th - September 18th)
-
Ai Ōtsuka - Planetarium - 90,567
- 1 week (September 19 - September 25)
-
Hikaru Utada - Be My Last - 80.064
- 1 week (September 26th - October 2nd)
-
HYDE - Countdown - 64.037
- 1 week (October 3rd - October 9th)
-
V6 - orange - 72.434
- 1 week (October 10th - October 16th)
-
DEF.DIVA - Suki Sugite Baka Mitai - 26,353
- 1 week (October 17th - October 23rd)
-
Ken Hirai - Pop Star - 70,681
- 1 week (October 24th - October 30th)
-
Shuuji to Akira - Seishun Amigo - 520.419 / 250.108
- 2 weeks (October 31 - November 13, 3 weeks in total)
-
Arashi - Wish - 177,528
- 1 week (November 14th - November 20th)
-
SMAP - Triangle - 181.908
- 1 week (November 21 - November 27)
-
Ayumi Hamasaki - Bold & Delicious / Pride - 83,708
- 1 week (November 28th - December 4th)
-
Kumi Kōda - You - 72,111
- 1 week (December 5th - December 11th)
-
Exile - Tada ... Aitakute - 254,407
- 1 week (December 12th - December 18th)
-
KinKi Kids - Snow! Snow! Snow! - 230,384
- 1 week (December 19th - December 25th)
-
Shuuji to Akira - Seishun Amigo - 108.006
- 1 week (December 26, 2005 - January 8, 2006, a total of 3 weeks)
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-
KinKi Kids - KinKi Single Selection 2 - 356,117
- 1 week (December 28, 2004 - January 9, 2005)
-
Exile - Perfect Best - 970.126
- 1 week (January 10th - January 16th)
-
SPITZ - souvenir - 175.815
- 1 week (January 17th - January 23rd)
-
Glay - White: Ballad Best Singles - 175,815
- 1 week (January 24th - January 30th)
-
Chemistry - Hot Chemistry - 104,856
- 1 week (January 31 - February 6)
-
BoA - Best of Soul - 489,067
- 1 week (February 7th - February 13th)
-
Love Psychedelico - Early Times - 201.354 / 90.341
- 2 weeks (February 14th - February 27th)
-
YUKI - Joy - 135,624
- 1 week (February 28th - March 6th)
-
Aiko - Yume no Naka no Massugu na Michi - 254.756
- 1 week (March 7th - March 13th)
-
Mika Nakashima - Music - 231.521 / 88.024
- 2 weeks (March 14th - March 27th)
-
Def Tech - Def Tech - 75,346 / 82,459
- 2 weeks (March 28th - April 10th, 4 weeks in total)
-
B'z - The Circle - 345,041
- 1 week (April 11th - April 17th)
-
ZONE - E: Complete A Side Singles - 98,362
- 1 week (April 18th - April 24th)
-
NEWS - Touch - 164.016
- 1 week (April 25th - May 1st)
-
Def Tech - Def Tech - 99,236
- 1 week (May 2nd - May 8th, 4 weeks in total)
-
Nami Tamaki - Make Progress - 92,154
- 1 week (May 9th - May 15th)
-
Def Tech - Def Tech - 62,532
- 1 week (May 16 - May 22, 4 weeks in total)
-
Oasis - Don't Believe the Truth - 95.026
- 1 week (May 23rd - May 29th)
-
w-inds. - Ageha - 76,514
- 1 week (May 30th - June 5th)
-
Yuzu - Home (1997-2000) - 320,541
- 1 week (June 6th - June 12th)
-
Oda Kazumasa - Soukana - 171.026
- 1 week (June 13th - June 19th)
-
L'Arc ~ en ~ Ciel - Awake - 225.137
- 1 week (June 20th - June 26th)
-
Ketsumeishi - Ketsu no Police 4 - 947.826 / 308.057 / 220.916
- 3 weeks (June 27th - July 17th)
-
Sukima Switch - Kuso Clip - 146.180
- 1 week (July 18th - July 24th)
-
SMAP - Sample Bang! - 285,236
- 1 week (July 25th - July 31st)
-
Arashi - One - 121,187
- 1 week (August 1st - August 7th)
-
O-Zone - Disco-Zone: Koi no Maiahi - 44.440 / 66.761
- 2 weeks (August 8th - August 21st)
-
M-Flo - Beat Space Nine - 140.823
- 1 week (August 22nd - August 28th)
-
Rip Slyme - Good Job! - 350.054
- 1 week (August 29th - September 4th)
-
Dragon Ash - Rio de Emocion - 93.258
- 1 week (September 5th - September 11th)
-
Bon Jovi - Have a Nice Day - 123.410
- 1 week (September 12th - September 18th)
-
Mr. Children - I ♥ U - 686,688
- 1 week (September 19 - September 25)
-
Kumi Kōda - Best: First Things - 195.290
- 1 week (September 26th - October 2nd)
-
Southern All Stars - Killer Street - 633490
- 1 week (October 3rd - October 9th)
-
Orange Range - Иatural - 510.473 / 165.752
- 2 weeks (October 10th - October 23rd)
-
Destiny's Child - # 1's - 154,859
- 1 week (October 24th - October 30th)
-
Various Artists - Gundam Seed Best - 194.233
- 1 week (October 31 - November 6)
-
Bennie K - Japana Rhythm - 178,919
- 1 week (November 7th - November 13th)
-
KinKi Kids - H album: Hand - 245,681
- 1 week (November 14th - November 20th)
-
Ken Hirai - Utabaka 10th Anniversary Single Collection - 927,989
- 1 week (November 21 - November 27)
-
B'z - The Best "Pleasure II" - 761,640
- 1 week (November 28th - December 4th)
-
Mika Nakashima - Best - 480,097
- 1 week (December 5th - December 11th)
-
Otsuka Ai - Love Cook - 334,812
- 1 week (December 12th - December 18th)
-
Kobukuro - Nameless World - 252,975
- 1 week (December 19th - December 25th)
-
Ayumi Hamasaki - (Miss) understood - 653830
- 1 week (December 26, 2005 - January 8, 2006)
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