The highest-selling albums and mini-albums in Japan are ranked in the Oricon Weekly Chart, which is published by Oricon Style magazine. [1] The data are compiled by Oricon based on each album's weekly physical sales. In 2006, 42 albums reached the peak of the charts.
| Issue Date | Song | Artist(s) | Reference(s) |
|---|---|---|---|
| January 2 | Nameless World | Kobukuro | [2] |
| January 16 | (Miss)understood | Ayumi Hamasaki | [3] |
| January 23 | Koichi Domoto Endless Shock Original Sound Track | Kōichi Dōmoto | [4] |
| January 30 | Ribbon | Yuzu | [5] |
| February 6 | Adult | Tokyo Jihen | [6] |
| February 13 | Ai Jibunhaku | Kreva | [7] |
| February 20 | Sora Ippai ni Kanaderu Inori | Aqua Timez | [8] |
| February 27 | Outgrow | BoA | [9] |
| March 6 | The Love Rocks | Dreams Come True | [10] |
| March 13 | Coward | Endlicheri☆Endlicheri | [11] |
| March 20 | Best: Second Session | Kumi Koda | [12] |
| March 27 | [13] | ||
| April 3 | Best of KAT-TUN | KAT-TUN | [14] |
| April 10 | Asia | Exile | [15] |
| April 17 | Cycle Hit 1991-1997 Spitz Complete Single Collection | Spitz | [16] |
| April 24 | Confidence | HY | [17] |
| May 1 | [18] | ||
| May 8 | Catch the Wave | Def Tech | [19] |
| May 15 | [20] | ||
| May 22 | Stadium Arcadium | Red Hot Chili Peppers | [21] |
| May 29 | Horizon | Remioromen | [22] |
| June 5 | [23] | ||
| June 12 | [24] | ||
| June 19 | 1000000000000 | T.M. Revolution | [25] |
| June 26 | Ultra Blue | Hikaru Utada | [26] |
| July 3 | [27] | ||
| July 10 | Monster | B'z | [28] |
| July 17 | Arashic | Arashi | [29] |
| July 24 | Speciality | Nami Tamaki | [30] |
| July 31 | Garyūsenpū | Megaryu | [31] |
| August 7 | Pop Up! SMAP | SMAP | [32] |
| August 14 | Very Best II | V6 | [33] |
| August 21 | Crispy Park | Every Little Thing | [34] |
| August 28 | Beautiful Songs: Kokoro de Kiku Uta | Various Artists | [35] |
| September 4 | Kanojo | Aiko | [36] |
| September 11 | Shōnan no Kaze: Riders High | Shōnan no Kaze | [37] |
| September 18 | Wave | Yuki | [38] |
| September 25 | Mirror | Kōichi Dōmoto | [39] |
| October 2 | Live Goes On | Seamo | [40] |
| October 9 | All Singles Best | Kobukuro | [41] |
| October 16 | [42] | ||
| October 23 | [43] | ||
| October 30 | [44] | ||
| November 6 | Golden Best: 15th Anniversary | Zard | [45] |
| November 13 | First Message | Ayaka | [46] |
| November 20 | Eleven Fire Crackers | Ellegarden | [47] |
| November 27 | Stop the Clocks | Oasis | [48] |
| December 4 | All the Best | Chemistry | [49] |
| December 11 | Secret | Ayumi Hamasaki | [50] |
| December 18 | 5 Nen Mono | Masaharu Fukuyama | [51] |
| December 25 | I Album: ID | KinKi Kids | [52] |