SID Group was founded in 2003 by vocalist Mao (ex-SHULA) and bassist Aki (ex-RAM∞REM). Soon as session musicians were joined by two more member: guitarist Shinji (ex-Uranus) and drummer Yuuya (ex-SHULA). In August 2003 they released their first Yoshigai gaku 17 sai (mushoku) MD.
Despite the fact that the actual group started its activities in 2003, the musicians feel SID creation date January 14, 2004, the day when their concert at Meguro Rock May Kan announced that Shinji and Yuuya become official members of the group. It is now in the final composition, they released their first single Kaijou-Ban in March 2004. After that, the children went abroad for a two-day performance at the American anime convention ACEN (Anime Central), which took place in May 2004. Young team performed quite well, winning the attention of many foreign fans. From that moment the desire to return to the group and perform in America again only strengthened.
Without reducing speed, in December 2004, SID released their first full album, Renai, and took part in the two annual events sponsored by their label: Christmas and the 'Beauti-Fool's Fest 04', sponsored also made FOOL'S MATE magazine. They continued to take part in concerts and other events up until the following year, including his first solo concert. And after that they released their second album.
2006 for the SID has been eventful: they first hit the top ten Oricon charts with their summer single, chapter 1, and they were able to play a solo concert at the Nippon Budokan stadium. At the end of the year, the band released their third album, play, and go with a solo tour of Japan. New Year 2007 brought many singles, including released in September Mitsuyubi ~ MITSUYUBI ~, with whom the band for the first time entered the top five chart Oricon. A few months later, in late 2007, SID released a new maxi-single Namida no ondo. February 20, 2008 the band released their fourth album Sentimental Macchiato.
The second DVD SID appeared on 14 May. SIDNAD Vol.2 ~ CLIPS ONE ~ was the first publication of this kind of group. This is a DVD with music videos, it only 9 movies. June 30 limited edition, a book group. The SID Tour Document Book, mostly pictures of the band were presented, as well as a variety of reports about the concerts and other articles related to their tour Sentimental Macchiato. This book allowed fans a glimpse into the personal life of the children, whether it is out of the scene or the scene.
The first concert DVD SIDNAD Vol. 3 ~ TOUR 2008 Sentimental Macchiato ~ was released on October 15th. It was presented with a recording of the concert tour Sentimental Macchiato Tour Final Period in Yoyogi Kyogijo Daiichi. On 29 October in the sale came the first major single group, Monokuro no Kiss, presented in three versions. The title track of the single was the opening theme for the anime "Kuroshitsuji". The second major single titled "2ºC Me no Kanojo" musicians release January 14, 2009.
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's newest song is "Rain (雨)" which is the fifth opening theme and sixth ending theme for the anime Fullmetal Alchemist: Brotherhood. Released on June 2, 2010, "Rain" ranked No.1 on the Oricon Daily charts on June 4 and 5, marking the first time SID has ever placed No. 1 on the daily charts. "Rain" is SID's second contribution to the Fullmetal Alchemist franchise, making them one of the two artists contributing more than one song for Fullmetal Alchemist (the other being L'Arc-en-Ciel). However, on the weekly charts "Rain" was ranked No.2. On September 29, 2010 they released a new single titled "Cosmetic" and performed at Tokyo Dome on December 11, 2010. On 2010 December 1 they released a single, "Ranbu no Melody" (乱舞のメロディ) which was used as the 13th opening theme of Bleach from Episodes 292 to 316.
They got the Top Pop Artist Award from Billboard Japan Music Awards 2010 on February 6, 2011. Also they participated in Kuroyume's tribute album which was released on February 9, the song SID will do is "Yasashii Higeki(Tender Tragedy)" a song by Kuroyume that was released in 1995. A DVD with footage from their live at Saitama Super Arena and Tokyo Dome was released and is available in 3D on Blu-ray. The DVD also placed 3rd on Oricon weekly. Their new single entitled "Itsuka", was followed by another performance at Nippon Budokan on October 4. Their 7th DVD, SIDNAD Vol.7: dead stock tour 2011 was released on the next day. "Itsuka" reached No. 1 on the daily charts and placed second on the weekly charts.
On December 28, 2011 SID released "Fuyu no Bench". SID performed at the Ontama Carnival on January 29, 2012. Their single "S" was decided to become the theme of Sadako 3D and an image song for the 2013 film adaptation of Carrie. Their single "VIP" was released on 21 November 2012, and is the opening theme for the anime adaptation of the manga Magi: The Labyrinth of Magic. Another single, "Anniversary" will be the opening theme for the second season of said anime. On March 6, 2013, SID releases their M&W Tour Live Concert in DVD form [SIDNAD Vol.8～TOUR 2012 M&W～]
On April 6, 2013, SID hold the live event for their commemorative 10th Anniversary of SID at Yokohama Stadium. On May 24, 2013 SID also performed in Singapore for the first time at the MUSIC MATTERS LIVE 2013 event. They release their new single "Summer Lover" on 24 July 2013 followed by 2 other side single included in the album Side B Complete Collection on August 21, 2013. The two tracks mentioned are CELEBRITY and SENSE. On July 27, 2013, SID make a tour for their 10th Anniversary Live, first at Fukuoka; then at Sendai on August 3, 2013, Osaka on August 10, 2013, and finally at Fujikyu Highland, Yamanashi on 24–25 August 2013.
On December 11, 2013, SID is releasing their live DVD during Yokohama Concert, consisting of 22 songs included 『SIDNAD Vol.9 ～YOKOHAMA STADIUM～』<10th Anniversary LIVE> and later on December 27, 2013, SID will hold the final live event in 2013, commemorative for their 10th Anniversary Projects in Nippon Budokan [VISUAL BANG! 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.
Following on the February 12, 2014, SID will release their new single 『hug』.On August 27 2014, SID's Enamel was released and it was used for the opening title in Kuroshitsuji: Book of Circus.
On May 13 2017, SID created the new song "Rasen no Yume" (Spiral Dream) for the anime adaptation of Altair: A Record of Battles. The song's CD single will go on sale on August 2, 2017 in three versions (a limited first pressing with a DVD, a standard edition, and a limited standard pressing with an anime illustration).
Mao (マオ) - Vocal
- Real Name: Yamaguchi Masao
- Stage Names: MAO, Mao (マオ)
- Nick Name: Maonyan
- Birth Date: October 23rd, 1977
- Birth Place: Fukuoka Prefecture, Japan
- Blood Type: AB
- Height: 173 cm
- Weight: 54kg
- Eyesight: 2.5
- Shoe Size: 25.5 cm
- Cigarettes: Mild Seven Super Lights
- Favorite Foods: fuji soba noodle and katsu rice set
- Favorite Places: home, Koenji, Ahimokitazawa, Tenjin, on the stage, in water
- Favorite Artists: Kuroyume, SADS, Shiina Ringo, Yamaguchi Momoe, Malice Mizer, Ozawa Kenji, Inoue Yousui, aiko, BONNIE PINK, SID
- Previous Band: SHULA
Shinji - Guitar
- Real Name: Ninomiya Shinji
- Stage Name: Shinji (ex. しんじ)
- Birth Date: December 8, 1979
- Birth Place: Saitama Prefecture, Japan
- Blood Type: O
- Family: Mother and older brother
- Height: 178 cm
- Weight: 57 kg
- Shoe Size: 27.5 cm
- Favorite Artists: BOØWY, Hotei Tomoyasu
- Favorite Color: white and green
- Perfume: no perfume
- Cigarettes: Marlboro
- Previous Bands: CRIME, URANUS
Aki (明希) - Bass
The bassist and one of the founding members of the Japanese rock band SID. In 2012, he joined the Halloween project HALLOWEEN JUNKY ORCHESTRA. He also started a solo carrier under the name AKi in early 2015.
- Real Name: Ichiki Akihito (一木明仁)
- Stage Names: Aki (明希), also Mimegumi Aki (御恵明希) during SID's early days
- Birthday: February 3rd, 1981
- Birthplace: Tokyo, Japan
- Blood Type: B
- Family: Father, Mother and Brother
- Height: 175 cm
- Weight: 55 kg
- Eyesight: Both 2.0
- Shoe Size: 27.0 cm
- Favorite Brand: Vivienne Westwood, 20471120, PPFM
- Cigarettes: Marlboro lights
- Favorite Place: On stage, In own room
- Favorite Artists: Lagwagon, Linkin Park, Marilyn Manson, BUCK-TICK, AYA, James Iha of The Smashing Pumpkins, Jimmy Eat World, Stereophonics
- Previous Bands: RAM∞REM
Yuuya (ゆうや) - Drums
- Real Name: Shirato Yuuya
- Stage Names: Yuuya (ゆうや), YUYA
- Birth Date: December 9th, 1981
- Birth Place: Chiba Prefecture, Japan
- Blood Type: A
- Family: Father, Mother, and Younger Brother
- Height: 180 cm
- Weight: 60 kg
- Shoe Size: 27.5 ~ 28.0 cm
- Favorite Brand: Gucci, (b)APE, bounty hunter
- Perfume: GUCCI RUSH
- Favorite Artists: JUDY AND MARY, Shiina Ringo, Mr. Children, Anzen Chitai, Tamaoki Koji
- Cigarettes: Mild Seven Star Brand (12mg)
- Ring Size: 23
- Favorite Color: Red
- Previous Bands: Clench Fists, SHULA