SS501

SS501 (pronounced as Double-S 501) is a South Korean boy band under management of Daesung Entertainment, also known as DSP Entertainment. They debuted in 2005 with their first single "경고" (Warning), with a second single "Snow Prince" released in late 2005. The group was inactive in Korea for most of 2006, although they had a fan meeting in Japan in April. The hiatus was due to Heo Young Saeng's throat condition which required surgery, thus resulting in a need for time to fully recover.. Around July - September 2006, they held their first concert, "Step Up Concert" in Osaka, Japan. In late 2006, they returned to Korea in order to promote their first full album, which was released on November 10. Singles from the album included "Unlock" and "Four Chance". As well as promoting the album on various variety and music shows, they also filmed a show on MNet called SOS. On their 600th day (January 28, 2007), they won the Mutizen award from SBS Inki Gayo for their song "Four Chance". As of 2007 they are planning to release an album in Japan (presumably in Japanese) sometime in the future and eventual releases may include a Thai version.

A Japanese fanclub is currently being established with the name of "Triple S Japan"; it will officially debut on March 25, 2007, when SS501 will have its first official meeting with the group. In Korea, their fan club members number around 417,000.

Recently the boys are in Japan with their new Japanese single "Kokoro" There are six types, each member recorded a solo and as well with the group. The single debuted 5th on the Oricon Chart. Currently, now the members are working hard on their first Japanese Album, which the date is set to be October 24 for the release.