In what year was the album “Rough Diamond” released by 加藤和樹?

In what year was the album “Rough Diamond” released by 加藤和樹?: The album “Rough Diamond” was released in 2006 by 加藤和樹, featuring 6 tracks.
What is the most successful song from the album “Rough Diamond” by 加藤和樹?: “WARNING” is the biggest hit from the album “Rough Diamond” by 加藤和樹.

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