"Hopeful" is a song by Japanese recording artist Ami Suzuki, taken from her fourth studio album (and first in Avex) Around the World.
The original version of the song, arranged by its composer Shunsuke Yazaki, was first introduced in commercial spots announcing Ami's comeback to music in the Avex Trax label.
It was set to be digitally released on February 9, 2005 (Suzuki's birthday), through Japanese music download sites such as Mu-Mo and Mora.
[1][2] Later, the song was remixed by Japanese DJ and trance producer Overhead Champion, and this one became the lead version, being used in the music video for "Hopeful".
Her sleep and consequent awakening in the video most likely refers to her absence and subsequent comeback in the major music industry.