# List of Oricon number-one singles of 2008

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. In 2008, 49 singles reached the peak of the chart.
R&B singer Namie Amuro's "60s 70s 80s" became her first number one single in nearly 10 years. The single made Amuro the only female Japanese artist to have a Top 10 single for 14 consecutive years. Pop boy band NEWS' "Happy Birthday" made them the second group after the KinKi Kids to have 10 consecutive number one singles since their debut. "Purple Line" made Korean pop boy band TVXQ the fifth non-Japanese Asian artist and the first male group to have a number one on the charts. With the release of "Jumon: Mirotic" they became the only foreign artist to have four number ones on the chart.
R&B singer Thelma Aoyama's "Soba ni Iru ne" became the fastest-selling single of 2008, selling over a million copies digitally. The single was then certified by Guinness World Records as "the best selling download single in Japan". Pop singer Ayumi Hamasaki's "Mirrorcle World" debuted atop the chart, this makes Hamasaki the only female artist to have a number one single for 10 consecutive years. Technopop girl group Perfume's "Love the World" is the first technopop single to ever rank number one on the charts. Mr. Children and Greeeen are the only two artists that had an extended run on the charts.
The best-selling single overall of 2008 was pop boy band Arashi's "Truth/Kaze no Mukō e", selling a little over 618,000 copies. Arashi's "One Love" also took the place as the second-best-selling single, which sold more than 524,000 copies, followed by pop rock band Southern All Stars' "I Am Your Singer" with 520,000 copies. The fourth- and fifth-best-selling singles of 2008 were "Kiseki" by Greeeen and "Shuchishin" (羞恥心, Shūchishin) by Shuchishin's, respectively. "Truth/Kaze no Mukō e" and "One Love" taking the Top Two spots made Arashi the fifth artist to do so. This was last achieved by Princess Princess in 1989.

## Chart history

| Issue Date | Single | Artist(s) |
| January 14 | "Dangan Fighter" (弾丸ファイター, Dangan Faitā, Bullet Fighter) | SMAP |
| January 21 | "Mirage" | AAA |
| January 28 | "Purple Line" | TVXQ |
| February 4 | "Order Made" | Radwimps |
| February 11 | "Soba ni Iru ne" | Thelma Aoyama feat. SoulJa |
| February 18 | "Lips" | KAT-TUN |
| February 25 | "Anata ga Koko ni Itara" (あなたがここにいたら, If Only You Were Here) | Porno Graffitti |
| March 3 | "Step and Go" | Arashi |
| March 10 | "Taiyō no Namida" (太陽のナミダ, The Sun's Tears) | NEWS |
| March 17 | "Sono Mama/White Message" (そのまま／Ｗｈｉｔｅ　Ｍｅｓｓａｇｅ, Just That Way/White Message) | SMAP |
| March 24 | "Wahaha" | Kanjani Eight |
| March 31 | "60s 70s 80s" | Namie Amuro |
| April 7 | "Ore ja Nakya, Kimi ja Nakya" (オレじゃなきゃ、キミじゃなきゃ) | 20th Century |
| April 14 | "Drink It Down" | L'Arc-en-Ciel |
| April 21 | "Mirrorcle World" | Ayumi Hamasaki |
| April 28 | "Burn (Fumetsu no Face)" | B'z |
| May 5 | "Beautiful You/Sennen Koi Uta" | TVXQ |
| May 12 | "No More" | Tsukasa Maizu |
| May 19 | "Summer Time" | NEWS |
| May 26 | "Don't U Ever Stop" | KAT-TUN |
| June 2 | "Dreams Come True" | Hey! Say! JUMP |
| June 9 | "Kiseki" | Greeeen |
| June 16 | "Kiseki" | Greeeen |
| June 23 | "Verb" | Glay |
| June 30 | "Ai Ai Gasa" | Tegomass |
| July 7 | "One Love" | Arashi |
| July 14 | "Summer Song" | Yui |
| July 21 | "Love the World" | Perfume |
| July 28 | "Dōshite Kimi o Suki ni Natte Shimattandarō? | TVXQ |
| August 4 | "Your Seed/Bōken Rider" | Hey! Say! JUMP |
| August 11 | "Gift" | Mr. Children |
| August 18 | "I Am Your Singer" | Southern All Stars |
| August 25 | "Kono Toki, Kitto Yume Ja Nai" (この瞬間、きっと夢じゃない, This Moment, I Know It's Not a Dream) | SMAP |
| September 1 | "Truth/Kaze no Mukō e" | Arashi |
| September 8 | "Secret Code" | KinKi Kids |
| September 15 | "Hanabi" | Mr. Children |
| September 22 | "Hanabi" | Mr. Children |
| September 29 | "Light In My Heart/Swing!" | V6 |
| October 6 | "The Birthday: Ti Amo" | Exile |
| October 13 | "Happy Birthday | NEWS |
| October 20 | "Taboo" | Kumi Koda |
| October 27 | "Jumon (Mirotic)" | TVXQ |
| November 3 | "Mayonaka no Shadow Boy" | Hey! Say! JUMP |
| November 10 | "Musekinin Hero" | Kanjani Eight |
| November 17 | "Beautiful Days" | Arashi |
| November 24 | "Tsuretette Tsuretette" (連れてって　連れてって, Take Me Take Me) | Dreams Come True |
| December 1 | "Hakanaku mo Towa no Kanashi" | Uverworld |
| December 8 | "Last Christmas" | Exile |
| December 15 | "White X'mas" | KAT-TUN |
| December 22 | "Yowamushi Santa" (弱虫サンタ, Cowardly Santa) | Shuchishin |
| December 29 | "Days/Green | Ayumi Hamasaki |