The September 11 attacks influenced Hamasaki's writing for her studio albums "I Am..." and "Rainbow". "I Am..." focused on world peace and political aspects and featured "A Song Is Born", a song particularly influenced by the event which had been included on "Song Nation", a non-profit album funded by her label Avex Trax for the September 11 victims. The song itself sold over 400,000 units in Japan and the profits were donated towards the American government to help with the damages.