Sid (シド, Shido) (stylized in all caps when romanized) is a Japanese visual kei rock band, formed in 2003 and signed to Ki/oon Records.

[1][2] Formed by Mao, Shinji, Aki and Yūya, they are known for producing anime songs, such as for Fullmetal Alchemist, Bleach, Black Butler or Magi.

After reaching Oricon chart top 5 for the first time with "Mitsuyubi" (2007), Sid made their major label debut in 2008 with "Monochrome no Kiss" and the gold disc Hikari, which includes one of their most famous songs "Uso".

The four of them released the band's first demo CD, Yoshigai Manabu 17-sai (Mushoku) (吉開学 17歳 (無職)), on mini-disc that August and soon after, they signed on with Danger Crue Records.

Though Sid technically began in 2003, the band considers January 14, 2004 the date of their 'birth' as it was announced at their show at the Meguro Rock May Kan that Shinji and Yuuya would be joining as official members.

With their line-up now complete, they released their first single "Kaijou-Ban"(会場限定盤) in March before traveling overseas for a two-day performance at the American convention Anime Central in May.

Sid grew rapidly in their initial years, at a rate which surprised numerous publications and notoriously earned them the title "the monster band of the indie scene".

2006 was a big year for Sid: they broke into the Oricon top ten for the first time with their summer single, "Chapter 1", and they were able to play a one-man at the famous Nippon Budokan live hall.

The following year brought a slew of new singles, including September's "Mitsuyubi" (蜜指), which was the band's first to reach the Oricon top five.

Their next single, titled "2°C me no kanojo" (2°C目の彼女), came out in January 2009, and three months later "Uso" (嘘) debuted at number two on the Oricon charts and was also used as the 1st ending theme song of Fullmetal Alchemist: Brotherhood.

On March 3, 2010, Sid released their Single "Sleep" and announced their performance at Saitama Super Arena on July 31 in a special CM on TV Asahi program "Ikinari!Ogon Densetsu" on February 11, subsequently selling out 30,000 tickets in just one day.

Sid 10th Anniversary Final Party] where they invite other artists such as Ayabie, R-Shitei, Alice Project, Kameleo, Zoro, DIV, Daizystripper, Dog in the PWO, v[New] and Moran.

[9] In 2018, Sid participated in the festival Lunatic Fest hosted by Luna Sea on June 23 and released their first EP in August, Ichiban Suki na Basho.

[16] In 2022 they composed the opening theme for Japanese version of Heaven Official's Blessing, "Jiu no Kuchizuke", featured on Umibe album that premiered on March 23.

[17] Sid resumed the live shows in January 2023[16] and started the celebrations at 20 years of the band's career, releasing a box set with all the albums and singles (after "Enamel") and officially uploading their music videos on YouTube.