√thumm is a Japanese electropop group from Nara, Japan formed in 2007. The group is composed of, Lio (vocals), Sujin (guitar), Benjamin Red (synths). In 2008, √thumm's single 'autumn love' was in the iTunes top 10 selling electronic singles. In 2009, √thumm was signed to NEUTRAL NINE RECORDS and released their first full-length album in December, coton.
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