List of Oricon number-one singles of 2011
# List of Oricon number-one singles of 2011

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 3 | "Dream On" | Naoya Urata featuring Ayumi Hamasaki |
| January 10 | "Toilet no Kamisama" | Kana Uemura |
| January 17 | "Toilet no Kamisama" | Kana Uemura |
| January 24 | "Dada" | Radwimps |
| January 31 | "Hadakanbō" (はだかんぼー, Nude) | Tomohisa Yamashita |
| February 7 | "Why? (Keep Your Head Down)" | TVXQ |
| February 14 | "Ultimate Wheels" | KAT-TUN |
| February 21 | "Each Other's Way (Tabi no Tochū)" (Each Other's Way 〜旅の途中〜, Each Other's Way (On the Way to Travel)) | Exile |
| February 28 | "Sakura no Ki ni Narō" | AKB48 |
| March 7 | "Lotus" | Arashi |
| March 14 | "Eternal" | Jin Akanishi |
| March 21 | "Banzai Venus" (バンザイVenus, Hooray Venus) | SKE48 |
| March 28 | "Shūmatsu Not Yet" (週末Not yet, Weekend Not Yet) | Not Yet |
| April 4 | "Greatest the Hits 2011–2011" | Maximum the Hormone |
| April 11 | "Greatest the Hits 2011–2011" | Maximum the Hormone |
| April 18 | "Jet Coaster Love" | Kara |
| April 25 | "Sayonara Kizu Darake no Hibi yo" | B'z |
| May 2 | "T.W.L/Yellow Pansy Street" | Kanjani Eight |
| May 9 | "Let Me Cry" | Jang Keun-suk |
| May 16 | "Shōjo Hikō" | Passpo |
| May 23 | "My Home" | Kanjani Eight |
| May 30 | "White" | KAT-TUN |
| June 6 | "Everyday, Kachūsha" | AKB48 |
| June 13 | "Don't Wanna Lie" | B'z |
| June 20 | "365 Nichi Kazoku" | Kanjani Eight |
| June 27 | "Time" | KinKi Kids |
| July 4 | "Flower" | Atsuko Maeda |
| July 11 | "OVER" | Hey! Say! JUMP |
| July 18 | "Naminori Kakigōri" (波乗りかき氷, Surfing Kakigōri) | Not Yet |
| July 25 | "Fui ni" (ふいに, Suddenly) | Tomomi Itano |
| August 1 | "Zetsumetsu Kurokami Shōjo" | NMB48 |
| August 8 | "Pareo wa Emerald" (パレオはエメラルド, Pareo wa Emerarudo, Pareo Is Emerald) | SKE48 |
| August 15 | "Run for You" | KAT-TUN |
| August 22 | "Everybody Go" | Kis-My-Ft2 |
| August 29 | "Tsubusa ni Koi" | Kanjani Eight |
| September 5 | "Flying Get" | AKB48 |
| September 12 | "Kazoku ni Narō yo/Fighting Pose" (家族になろうよ/fighting pose, Let's Be a Family) | Masaharu Fukuyama |
| September 19 | "Fighters" | Sandaime J Soul Brothers |
| September 26 | "Rising Sun/Itsuka Kitto..." (Rising Sun/いつかきっと…, Surely Someday…) | Exile/Exile Atsushi |
| October 3 | "Magic Power" | Hey! Say! JUMP |
| October 10 | "Bo Peep Bo Peep" | T-ara |
| October 17 | "Green a.Live" | Yui |
| October 24 | "XXX" | L'Arc-en-Ciel |
| October 31 | "Oh My Gā!" | NMB48 |
| November 7 | "Kaze wa Fuiteiru" | AKB48 |
| November 14 | "Meikyū Love Song" | Arashi |
| November 21 | "Okie Dokie" | SKE48 |
| November 28 | "Sexy Zone" | Sexy Zone |
| December 5 | "Saisho no Mail" (最初のメール, Saisho no Mēru, First E-mail) | French Kiss |
| December 12 | "Birth" | KAT-TUN |
| December 19 | "Ue kara Mariko" | AKB48 |
| December 26 | "We Never Give Up!" | Kis-My-Ft2 |
