nitial career

[yawn~]"hello"

Her professional career began in March 2004 when at the recommendation of her juku instructors she applied for an audition hosted by Sony Music Japan.^[3] Despite the audition rule that a participant could only sing two songs, Yui sang three, with all of the judges gave her the highest score possible and causing a fierce scramble among record labels to sign her. She first sang "Why Me" (a song later included in her major label debut single), followed by "It's Happy Line" and "I Know". Because "I Know" was incomplete at the time, the judges were able to get a glimpse of what would later be dubbed "Yui-go", or Yui-talk (Yui語 in Japanese), nonsensical English hummed to a tune during her songwriting process — an example of Yui-go can be found in the film Midnight Sun when Yui is working on the song "Goodbye Days".

On Christmas Eve of that year, she released her debut single "It's Happy Line" under the indie label Leaflet Records, coupled with the track "I Know". The pressing was limited to only 2000 copies in her home area