The 2007 single "Eternal Circle" marks a return to rock-influenced sounds for Shiina, showcasing a more mature vocal style than her earlier idol-pop work.
- "Eternal Circle" was released on Sony Music Labels Inc. on January 24, 2007.
- The single features an alternative rock sound, a departure from some of Shiina's earlier, more pop-oriented releases.
- The single was released during a period when Shiina was balancing her music career with her established voice-acting work.
Hekiru Shiina is a Japanese pop-rock singer and voice actress from Tokyo. She is best known for her work in the 1990s anime series "Namiuchigiwa wo Wataru" and her role as a singer in the anime "Magic Knight Rayearth."
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