This is a list of songs that reached #1 on the RIAJ Digital Track Chart in Japan in 2012. The highest-selling digital singles in Japan are published by Recording Industry Association of Japan . PC downloads and ringtone downloads are not eligible for the chart, only cellphone downloads (Chaku-uta Full) count for the chart.
The chart week runs from Wednesday to Tuesday. The first week of 2012, starting January 3, was merged with the following week (1/4-1/10) due to New Year's celebrations.
| Issue date | Song | Artist(s) | Reference(s) |
|---|---|---|---|
| January 10 | "Tatoe Donnani..." | Kana Nishino | [1] |
| January 17 | "Rising Sun" | Exile | [2] |
| January 24 | "Sekai de Ichiban Suteki na Kimi e." | Sonar Pocket | [3] |
| January 31 | "Sign" | Juju | [4] |
| February 7 | "Hajimari no Toki" | Ayaka | [5] |
| February 14 | "Give Me Five!" | AKB48 | [6] |
| February 21 | [7] | ||
| February 28 | "Misenai Namida wa, Kitto Itsuka" | Greeeen | [8] |
| March 6 | "Sakura, I Love You?" | Kana Nishino | [9] |
| March 13 | [10] | ||
| March 20 | "Inori (Namida no Kidō)" | Mr. Children | [11] |
| March 27 | [12] | ||
| April 3 | [13] | ||
| April 10 | [14] | ||
| April 17 | "Getsu Ka Sui Moku Kin Do Nichi. (Kimi ni Okuru Uta)" | Sonar Pocket | [15] |
| April 24 | "Orange" | Greeeen | [16] |
| May 8 | "Haru Uta" | Ikimono-gakari | [17] |
| May 15 | "Be..." | Ms. Ooja | [18] |
| May 22 | "Watashitachi" | Kana Nishino | [19] |
| May 29 | [20] | ||
| June 5 | [21] | ||
| June 12 | "Entenka" | Shōnan no Kaze | [22] |
| June 19 | "Tadaima" | Juju | [23] |
| June 26 | "Believe" | Che'Nelle | [24] |
| July 3 | [25] | ||
| July 10 | [26] | ||
| July 17 | [27] | ||
| July 24 | "Go for It!!" | Kana Nishino | [28] |