SS501

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.