Dream was a Japanese pop group signed to rhythm zone record label. In 1999 avex organized a huge talent contest, called "avex dream 2000", with the aim of finding the right girls for a new group. The result was dream, a three-piece group consisting of Matsumuro Mai, Tachibana Kana and Hasebe Yu. The original 3-member dream sold 950,700 records, and in total the group has sold over 1,100,000 records over the span of 10 years.
Since the group's debut in 2000 under the avex trax label, it has undergone many changes: In 2002, member and main lyricist Matsumuro Mai left and dream became an 8-member group. Two years later, in 2004, Ai Risa also left, making dream a 7-member group. In mid 2007, the group's name changed from dream to DRM. One year later, in 2008, Hasebe Yu left the group and DRM became Dream. In 2009 all the members changed their stage names to their own romanized given names. On February 19, 2011, Tachibana Kana, graduated from Dream after her announcement on the group's website on November 23, 2010. She had been a part of the group for 11 years. This marked the graduation of the last member of the original 3-member dream. In March, 2012, Yamamoto Sayaka and Erie in 2016 left the group.
The group announced their disbandment on June 4th, 2017.