List of Oricon number-one singles of 2021
# List of Oricon number-one singles of 2021

The following is a list of Oricon number-one singles of 2021.

## Chart history

| Issue date | Song | Artist(s) |
| - | - | - |
| January 4 | "Beautiful / Chinchaumakka / Canaria" | NEWS |
| January 11 | "Step and a Step" | NiziU |
| January 18 | "Photograph" | Poppin'Party |
| January 25 | "Shukan Umakuiku Yobi" | Johnny's West |
| February 1 | "Grandeur" | Snow Man |
| February 8 | "Boku wa Boku o Suki ni Naru" | Nogizaka46 |
| February 15 | "Koiochi Flag" | SKE48 |
| February 22 | "Kimi to Mitai Sekai" | Kanjani Eight |
| March 1 | "Boku ga Boku Janai Mitai da" | SixTones |
| March 8 | "Luv Bias" | Kis-My-Ft2 |
| March 15 | "Gekikara Love / Now Now Ningen / Konna Hazu ja Nakatta!" | Beyooooonds |
| March 22 | "Roar" | KAT-TUN |
| March 29 | "Dream on the Street" | Da Pump |
| April 5 | "Let's Music" | Sexy Zone |
| April 12 | "Breaking Dawn" | Jaejoong |
| April 19 | "Take a Picture / Poppin' Shakin'" | NiziU |
| April 26 | "Ban" | Sakurazaka46 |
| May 3 | "Hitori Janai" | Seventeen |
| May 10 | Challenger ("Born to Be Wild") | JO1 |
| May 17 | "Something New" | Johnny's West |
| May 24 | "Negative Fighter" | Hey! Say! JUMP |
| May 31 | "Magic Touch / Beating Hearts" | King & Prince |
| June 7 | "Kimi Shika Katan" | Hinatazaka46 |
| June 14 | "Bokura wa Mada / Magic Carpet Ride" | V6 |
| June 21 | "Gomen ne Fingers Crossed" | Nogizaka46 |
| June 28 | "Pale Blue" | Kenshi Yonezu |
| July 5 | "Hitori ni Shinai yo" | Kanjani Eight |
| July 12 | "Burn" | NEWS |
| July 19 | Border: Hakanai ("Given-Taken") | Enhypen |
| July 26 | "Hello Hello" | Snow Man |
| August 2 | "Un/Pair" | KinKi Kids |
| August 9 | "Dekkai Ai / Kido Airaku" | Johnny's West |
| August 16 | "Natsu no Hydrangea" | Sexy Zone |
| August 23 | "Mascara" | SixTones |
| August 30 | Stranger ("Real") | JO1 |
| September 6 | "Gunjo Runaway" | Hey! Say! JUMP |
| September 13 | "Ano Koro no Kimi wo Mitsuketa" | SKE48 |
| September 20 | "We Just Go Hard" feat. AK-69/"Euphoria" | KAT-TUN |
| September 27 | "Fear / So Blue" | Kis-My-Ft2 |
| October 4 | "Kimi ni Shikarareta" | Nogizaka46 |
| October 11 | "Nemohamo Rumor" | AKB48 |
| October 18 | "Koi Furu Tsukiyo ni Kimi Omou" | King & Prince |
| October 25 | "Nagaredama" | Sakurazaka46 |
| November 1 | "Hetare Tachi yo" | STU48 |
| November 8 | "Tteka" | Hinatazaka46 |
| November 15 | A ("Rocketeer"/"Brighter") | INI |
| November 22 | "Ubu Love" | Naniwa Danshi |
| November 29 | "Mirai e / ReBorn" | NEWS |
| December 6 | "Sing-Along" | Hey! Say! JUMP |
| December 13 | "Secret Touch" | Snow Man |
| December 20 | "Ai no Chikara" | Seventeen |
| December 27 | Wandering ("Bokura no Kisetsu" / "Prologue") | JO1 |
