These are the Oricon number one albums of 2002, per the Oricon Albums Chart.
| Indicates best-selling album of 2002 |
| Issue Date | Album | Sales | Artist(s) | |
|---|---|---|---|---|
| January 14 | I Am... | 1,751,360 | Ayumi Hamasaki | |
| January 21 | Love Psychedelic Orchestra | 325,060 | Love Psychedelico | |
| January 28 | 148,150 | |||
| February 4 | Various Artists featuring Song Nation | 81,140 | Various Artists | |
| February 11 | Huma-rhythm | 278,260 | Hitomi | |
| February 18 | Tommy february6 | 190,560 | Tommy february6 | |
| February 25 | 164,380 | |||
| March 4 | Jupiter | 250,210 | Bump of Chicken | |
| March 11 | Misia Greatest Hits | 587,210 | Misia | |
| March 18 | 561,190 | |||
| March 25 | Listen to My Heart | 230,590 | BoA | |
| April 1 | Do the Best | 415,320 | Do As Infinity | |
| April 8 | 4th Ikimasshoi! | 326,430 | Morning Musume. | |
| April 15 | Ketsunopolis 2 | 251,390 | Ketsumeishi | |
| April 22 | 90,130 | |||
| April 29 | Message | 88,160 | Mongol800 | |
| May 6 | Jiko Best | 431,250 | Kazumasa Oda | |
| May 13 | 531,630 | |||
| May 20 | It's a Wonderful World | 640,150 | Mr. Children | |
| May 27 | Power of Words | 242,100 | Rina Aiuchi | |
| June 3 | Stompin' On Down Beat Alley | 150,120 | Tokyo Ska Paradise Orchestra | |
| June 10 | 145,270 | Ringo Shiina | ||
| June 17 | The Official Album of the 2002 FIFA World Cup | 65,180 | Various Artists | |
| June 24 | Shanti | 140,210 | Hitomi Shimatani | |
| July 1 | bgcolor=#FFFF99 style="text-align: center;" rowspan="2" | Deep River | 2,350,170 | Hikaru Utada |
| July 8 | 550,250 | |||
| July 15 | Green | 800,120 | B'z | |
| July 22 | Hainumikaze | 301,110 | Chitose Hajime | |
| July 29 | 128,190 | |||
| August 5 | Tokyo Classic | 410,160 | Rip Slyme | |
| August 12 | 199,130 | |||
| August 19 | Rosso e Azzurro | 170,560 | Tsuyoshi Domoto | |
| August 26 | Tokyo Classic | 84,680 | Rip Slyme | |
| September 2 | Zenbu! Petitmoni | 73,590 | Petitmoni | |
| September 9 | True | 451,230 | Mika Nakashima | |
| September 16 | Self Portrait | 342,100 | Hitomi | |
| September 23 | Mikazuki Rock | 238,110 | Spitz | |
| September 30 | Unity Roots & Family, Away | 280,130 | Glay | |
| October 7 | Kiss in the Sky | 410,060 | Misia | |
| October 14 | 173,640 | |||
| October 21 | Shian | 340,110 | Koshi Inaba | |
| October 28 | I/flancy | 67,150 | Hitomi Yaida | |
| November 4 | Fairy Tale | 404,010 | Mai Kuraki | |
| November 11 | Rarities | 140,120 | Tatsuro Yamashita | |
| November 18 | Resistance | 132,150 | Mika Nakashima | |
| November 25 | 43,140 | |||
| December 2 | Stamp | 94,106 | Chage & Aska | |
| December 9 | Top of The Pops | 961,220 | Keisuke Kuwata | |
| December 16 | 238,784 | |||
| December 23 | 1,050,125 | B'z | ||
| December 30 | Rainbow | 1,016,482 | Ayumi Hamasaki | |