List of Oricon number-one singles of 2012
# List of Oricon number-one singles of 2012

The highest-selling singles in Japan are ranked in the Oricon Weekly Chart, which is published by Oricon Style magazine. The data are compiled by Oricon based on each singles' weekly physical sales.

## Chart history

| Issue Date | Singles | Artist(s) |
| - | - | - |
| January 2 | "Boku no Hanbun" (僕の半分, Half of Me) | SMAP |
| January 9 | "Seasons" | Jin Akanishi |
| January 16 | "Wonderful Cupid/Garasu no Mahō" (ワンダフル キューピット/がらすの・魔法・, Wandafuru Kyūpitto, Garasu no Mahō) "Wonderful Cupid/Magic of Glass" | NYC/Yuma Nakayama |
| January 23 | "Kawatta Katachi no Ishi" (変わったかたちの石, "Stone of Strange Form") | KinKi Kids |
| January 30 | "Good Luck" | Bump of Chicken |
| February 6 | "Kataomoi Finally" | SKE48 |
| February 13 | "Where You Are" | CN Blue |
| February 20 | "Junjō U-19" | NMB48 |
| February 27 | "Give Me Five!" | AKB48 |
| March 5 | "SUPER DELICATE" | Hey! Say! JUMP |
| March 12 | "Ai, Texas" (愛、テキサス, Ai, Tekisasu, "Love, Texas") | Tomohisa Yamashita |
| March 19 | "Wild at Heart" | Arashi |
| March 26 | "Still" | TVXQ |
| April 2 | "She! Her! Her!" | Kis-My-Ft2 |
| April 9 | "Ikiteru Ikiteku" (生きてる生きてく, "Alive, To Live") | Masaharu Fukuyama |
| April 16 | "Go for It, Baby (Kioku no Sanmyaku)" | B'z |
| April 23 | "Lady Diamond" (Lady ダイヤモンド, Redi Daiyamondo) | Sexy Zone |
| April 30 | "Inori (Namida no Kidō) / End of the Day/Pieces" (祈り 〜涙の軌道/End of the day/pieces, "Prayer (Tear's Orbit)/ End of the day/pieces") | Mr. Children |
| May 7 | "Sakasama no Sora" (さかさまの空, "Upside-down Sky") | SMAP |
| May 14 | "Oide Shampoo" | Nogizaka46 |
| May 21 | "Face Down" | Arashi |
| May 28 | "Aishite-love-ru!" | SKE48 |
| June 4 | "Manatsu no Sounds Good!" | AKB48 |
| June 11 | "Suika Baby" | Not Yet |
| June 18 | "Your Eyes" | Arashi |
| June 25 | "Ai Deshita." | Kanjani Eight |
| July 2 | "All Night Long" | Exile |
| July 9 | "To the Limit" | KAT-TUN |
| July 16 | "Heat" | Kim Hyun-joong |
| July 23 | "Android" | TVXQ |
| July 30 | "Chankapāna" | NEWS |
| August 6 | "ER" | Eight Ranger |
| August 13 | "Moment" | SMAP |
| August 20 | "Virginity" | NMB48 |
| August 27 | "Wanna Beeee!!!/Shake It Up" | Kis-My-Ft2 |
| September 3 | "Hashire! Bicycle" | Nogizaka46 |
| September 10 | "Gingham Check" | AKB48 |
| September 17 | "Aoppana" (あおっぱな, "Green Snot") | Kanjani Eight |
| September 24 | "Fumetsu no Scrum" | KAT-TUN |
| October 1 | "Kiss Datte Hidarikiki" | SKE48 |
| October 8 | "Oh!" | Girls' Generation |
| October 15 | "Sexy Summer ni Yuki ga Furu" (Sexy Summerに雪が降る, "It Snows in Sexy Summer") | Sexy Zone |
| October 22 | "Beautiful Life/Game" | Masaharu Fukuyama |
| October 29 | "Ikujinashi Masquerade" | Rino Sashihara with Anrire |
| November 5 | "Go to the top" | Koda Kumi |
| November 12 | "Uza" | AKB48 |
| November 19 | "Kitagawa Kenji" | NMB48 |
| November 26 | "Ai no Beat" (アイノビート, "Love's Beat") | Kis-My-Ft2 |
| December 3 | "Hikaru Monotachi" | Mayu Watanabe |
| December 10 | "Monsters" | The Monsters |
| December 17 | "Eien Pressure" | AKB48 |
| December 24 | "World Quest/Pokopon Pekōrya" | NEWS |
| December 31 | "Seifuku no Mannequin" | Nogizaka46 |
