超新星 (Cho Shin Sei) is six member South Korean boyband: 초신성 (Cho Shin Sung)
They made their Japanese debut in September of 2009 with three singles. Their first Japanese album 'hana' was released on the 21st of October, 2009.

Official Site: www.choshinsei.com


Members:

Yunhak
Stage Name : Spica Yunhak | Yunhak | ユナク (윤학 or 允鶴)
Name: Jung Yunhak (정윤학, 鄭允鶴)
Birthdate: December 2, 1984 (1984-12-02) (age 26)
Position: Leader, Vocalist

Sungje
Stage Name: Sirius Sungje | Sungje | ソンジェ (성제 or 成帝)
Name: Kim Sungje (김성제 or 金成帝)
Birthdate: November 17, 1986 (1986-11-17) (age 24)
Position: Main Vocalist, Main Dancer, Choreographer

Kwangsu
Stage Name : Becrux Kwangsu | Kwangsu | グァンス (광수 or 光秀)
Name: Kim Kwangsu (김광수, 金光秀)
Birthday: April 22, 1987 (age 23)
Position: Rapper

Sungmo
Stage Name : Vega Sungmo | Sungmo | ソンモ (성모 or 晟模)
Name: Yoon Sungmo (윤성모, 尹晟模)
Birthdate: June 15, 1987 (1987-06-15) (age 23)
Position: Lead Vocalist

Jihyuk
Stage Name : Acrux Jihyuk | Jihyuk | ジヒョク (지혁 or 智赫)
Name: Song Jihyuk (송지혁, 宋智赫)
Birthdate: July 13, 1987(23)
Position: Vocalist, Rapper

Geonil
Stage Name : Canopus Geonil | Geonil | ゴニル (건일 or 健一)
Name: Park Geonil (박건일, 朴健一)
Birthdate: November 5, 1987 (1987-11-05) (age 23)
Position: Main Rapper, Lead Dancer,Maknae of the team

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