The first single from '' Over the Rainbow '' , " 1000 Mankai no Kiss " was released in March 2011 , the song peaked at number four on the Oricon Weekly Singles chart , and successfully reached number fourteen in Taiwan . The follow-up single , " Mō Ichido " achieved a moderate success , reaching number seven in Japan . The third single from the album , " Your Best Friend " was released in October 2011 and served as the theme song to the Japanese animated television series '' Case Closed '' . The fourth single " Strong Heart " was released on DVD single format . The song themed about female empowerment served as the theme song to the Japanese television series '' Hunter '' . The part of profits gained from the released of the single was donated to support the reconstruction from the 2011 Tōhoku earthquake and tsunami . To support the album , she embarked on the concert tour '' Mai Kuraki Live Tour 2012 : Over the Rainbow '' from January 21 , 2012
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Over the Rainbow (Mai Kuraki album)