cosmosy
코스모시
On December 2, 2024, the official SNS accounts of the group opened and subsequently teased the group's name and number of members. The next day, the largest mobile carrier in Japan, NTT Docomo, announced it would be venturing into the entertainment industry with its first girl group, cosmosy, which is modeled after the K-Pop industry's system. Moreover, NTT Docomo announced that the all Japanese member lineup consisting of Himesha, De_Hana, Kamión and A'mei would be promoted as a global girl group.
On December 31, cosmosy was introduced through the release of "zigy=zigy"'s music video. On February 3, 2025, it was announced that cosmosy signed with Sony Music Entertainment Korea. The same day, it was also announced they would releasing "zigy=zigy" on global streaming platforms as their first and pre-debut digital single on February 7.
On March 13, 2025, cosmosy revealed through an interview with EVERLAST KOREA that they are preparing to release new music sometime this spring. On April 10, it was announced that cosmosy would be making their official debut globally with the digital single "Lucky=One", set to be released the following day. On April 11, cosmosy made their debut stage performance on Music Bank.
On May 30, cosmosy revealed through an interview with that they are already preparing for their next single. On June 2, it was announced that cosmosy would be making a comeback with "BabyDon'tCry=BreakingTheLove". On July 4, cosmosy released teaser photos revealing that the single is scheduled for release on July 18.
On September 10, it was announced that cosmosy would be releasing their first EP The A(e)nd on September 24. On November 17, it was announced that cosmosy would be releasing their fourth digital single "Physics ~ Falling Into You ~" on November 28. It was later revealed to act as the pre-release single for their second EP.
On November 28, 2025, it was announced that cosmosy will be releasing their second EP Of the World in March 2026. On March 17, cosmosy announced their fifth digital single "Chance ~ Switch On ~", set for release on March 20.
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