File:Champagne 2007-11-27.jpg|thumb|right|Alexandros (as [Champagne]) playing a street show at
Yoyogi Park in November 2007 Yoohei Kawakami formed the band [Champagne] in 2001 while attending Aoyama Gakuin University, beginning musical activities alongside Hiroyuki Isobe. They were eventually signed to RX-Records in 2007, and then made their official debut on January 20, 2010, with the release of
Where’s My Potato?. On March 25, 2014, during their annual "Premium V.I.P. Party", which was on that year hosted at EX THEATER ROPPONGI, the band announced a name change from [Champagne] to [Alexandros]. This decision was made following a request from the Japan branch of the
Comité Interprofessionnel du Vin de Champagne (C.I.V.C.). Just a few days later, on March 28, they officially introduced the new name at their first performance at the
Nippon Budokan, and all previous works released under [Champagne] were subsequently reissued under [Alexandros]. Later that year, on November 28, they signed a global partnership deal with Universal Music. The band marked their major debut on March 17, 2015, with the single "Wataridori / Dracula La" released through Universal Music Japan. The music video for "Wataridori" went on to surpass 100 million views on
YouTube by August 7, 2019. Their success continued, and on November 9, 2016, they achieved their first No. 1 ranking on the
Oricon Chart with their sixth studio album,
Exist!. On March 14, 2018, they announced the release of their 16th single "KABUTO" (the title was unannounced at the time) and revealed a change in the stylization of their band name to the all-uppercase [ALEXANDROS]. Kawakami later explained during his regular radio show that the change was made “just on a whim.” That same year, on August 16, they held their first outdoor one-man live concert, "V.I.P. PARTY 2018", at
Zozo Marine Stadium. On June 19, 2019, drummer Satoyasu Shomura suspended live performances due to focal dystonia, with Ib Riad from BIGMAMA stepping in as support drummer. At the start of the following year, on January 1, 2020, the band announced a new logo and reverted the stylization of their name back to [Alexandros]. Shortly after, on January 24, they revealed that Shomura would retire following the release of their "best of" album, ''Where's My History?'', in May. However, due to delays caused by the
COVID-19 pandemic, the album's release was postponed to January 2021, and his retirement was ultimately pushed back again to March 2021. On April 10, 2021, Ib Riad, who had been supporting the band, officially joined as a full member. Continuing their activities into the future, [Alexandros] hosted their first self-produced festival, "THIS FES '24 in
Sagamihara", on October 26–27, 2024, at Sagamihara Gion Field, celebrating the 70th anniversary of Sagamihara's city status. ==Band members==