List of Oricon number-one albums of 2003
These are the Oricon number one albums of 2003, per the Oricon Albums Chart.
Chart history
| † | Indicates best-selling album of 2003 |
| Issue Date | Album | Sales | Artist(s) |
|---|---|---|---|
| January 13 | Rainbow | 571,027 | Ayumi Hamasaki |
| January 20 | Second to None † | 1,075,872 | Chemistry |
| January 27 | 402,109 | ||
| February 3 | Life Is... | 351,258 | Ken Hirai |
| February 10 | Valenti | 615,218 | BoA |
| February 17 | 222,851 | ||
| February 24 | Styles of Beyond | 145,102 | Exile |
| March 3 | Kalk Samen Kuri No Hana | 165,316 | Ringo Shiina |
| March 10 | 136,214 | ||
| March 17 | 200 km/h in the Wrong Lane | 64,503 | t.A.T.u. |
| March 24 | A Ballads | 561,127 | Ayumi Hamasaki |
| March 31 | Sumire | 256,327 | Yuzu |
| April 7 | No. 5 | 122,136 | Morning Musume. |
| April 14 | Many Pieces | 53,715 | Every Little Thing |
| April 21 | 200 km/h in the Wrong Lane | 47,857 | t.A.T.u. |
| April 28 | Street Story | 106,278 | HY |
| May 5 | 103,245 | ||
| May 12 | 93,736 | ||
| May 19 | 86,912 | ||
| May 26 | Keep On Fighting | 90,524 | Tsuyoshi Nagabuchi |
| June 2 | 200 km/h in the Wrong Lane | 61,529 | t.A.T.u. |
| June 9 | 8 Mile: Music from and Inspired by the Motion Picture | 54,216 | Various Artists |
| June 16 | 48,761 | ||
| June 23 | St. Anger | 51,416 | Metallica |
| June 30 | Between the Lines | 361,265 | Chemistry |
| July 7 | Smap 016/MIJ | 305,268 | SMAP |
| July 14 | Between the Lines | 66,213 | Chemistry |
| July 21 | If I Believe | 251,218 | Mai Kuraki |
| July 28 | Time to Go | 225,671 | Rip Slyme |
| August 4 | Harvest | 252,812 | Dragon Ash |
| August 11 | Yuzu Smile | 115,458 | Yuzu |
| August 18 | Infinity: Love and Life | 75,412 | V6 |
| August 25 | Beautiful Energy | 118,568 | Twelve Girls Band |
| September 1 | 201,241 | ||
| September 8 | Magnum Collection "Slow" | 211,457 | Masaharu Fukuyama |
| September 15 | Nomad Soul | 125,645 | Chitose Hajime |
| September 22 | Every Best Single 2 | 281,571 | Every Little Thing |
| September 29 | Big Machine | 500,237 | B'z |
| October 6 | Road of Major | 290,751 | Road of Major |
| October 13 | Ketsunopolis 3 | 97,821 | Ketsumeishi |
| October 20 | 290,751 | ||
| October 27 | A.I.R | 95,243 | Rina Aiuchi |
| November 3 | G Album: 24/7 | 242,826 | KinKi Kids |
| November 10 | Longtime Favorites | 143,218 | Mariya Takeuchi |
| November 17 | Love | 437,218 | Mika Nakashima |
| November 24 | 213,517 | ||
| December 1 | Best Album 2001-2003 | 155,768 | Kick the Can Crew |
| December 8 | Akatsuki no Love Letter | 232,422 | Aiko |
| December 15 | Exile Entertainment | 395,257 | Exile |
| December 22 | 195,741 | ||
| December 29 | Memorial Address | 524,028 | Ayumi Hamasaki |
Trivia
- Number-one album of 2003: Second to None by Chemistry.
- Most weeks at number-one: HY with a total of 4 weeks.