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
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Over the Rainbow (Mai Kuraki album)