What makes tune the rainbow by Maaya Sakamoto notable?

This album is significant for solidifying Maaya Sakamoto's presence in the J-pop genre, reflecting her evolution as both an artist and performer. 'tune the rainbow' received critical acclaim and helped popularize her unique sound, particularly among anime fans, leading to her continued influence on the genre. When 'tune the rainbow' was released in April 2003, Maaya Sakamoto was transitioning from her early career as a voice actress to becoming a prominent J-pop artist. This album followed her successful debut album 'Lucy,' which established her as a versatile singer with a growing fanbase in Japan's anime music scene.