SS501

SS501
SS501
	SS501 during a fanmeeting in Hong Kong (2009); From L to R: Kim Hyung-jun, Kim Kyu-jong, Kim Hyun-joong, Heo Young-saeng, Park Jung-min
Background information
Also known as	Double-S 501; Five O One
Origin	South Korea
Genres	K-pop; J-pop; dance; R&B;
Years active	2005–2010; 2024–present;
Labels	DSP; Pony Canyon (Japan); Warner Taiwan;
Spinoffs	Double S 301;
Members	Kim Hyun-joong; Heo Young-saeng; Kim Kyu-jong; Park Jung-min; Kim Hyung-jun;
Korean name
Hangul	더블에스오공일
Revised Romanization
Transcriptions
Revised Romanization	Deobeureseuogongil
McCune–Reischauer	Tŏbŭresŭogongil
Japanese name
Hiragana	ダブルエスごーまるいち
Revised Hepburn
Transcriptions
Revised Hepburn	Daburuesu Gōmaruichi

SS501 (currently promoting as Five O One) is a South Korean boy band consisting of five members: Kim Hyun-joong, Heo Young-saeng, Kim Kyu-jong, Park Jung-min and Kim Hyung-jun. They debuted in 2005 with the EP Warning, which included their first number one song, "Never Again".

In 2007, SS501 entered the Japanese market with the maxi single Kokoro, which debuted at number five on the Oricon chart. The following year, in 2008, they became the first South Korean artists to win the award for Best New Artist at the Japan Gold Disc Awards.

SS501 has released one studio album and seven EPs in Korean, and two studio albums and three EPs in Japanese. After 14 years of inactivity, the group is set to reunite in 2025 for their 20th anniversary.