In what year was the album “Joyful” released by Hoshimura Mai?

In what year was the album “Joyful” released by Hoshimura Mai?: The album “Joyful” was released in 2006 by Hoshimura Mai, featuring 13 tracks.
What is the most successful song from the album “Joyful” by Hoshimura Mai?: “Himawari” is the biggest hit from the album “Joyful” by Hoshimura Mai.

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