sentences:  In April, 2006 they released their 6th full-length, "Taiyou no Naka no Seikatsu", and then their 7th album in May, 2007, self-titled "The Back Horn".Their 16th major single release, "Wana", was used as the first ending theme to the 2007 anime series "Mobile Suit Gundam 00".In January, 2008, they released a compilation album "Best the Back Horn" to celebrate their 10-year anniversary.