His grandfather often ran afoul of the Japanese occupation authorities for his support of Korean independence.

In 1965, he moved to Seoul and became acquainted with Son Jin-seok, the president of Oasis Records, becoming a singer.

Song Dae-kwan died from a heart attack on February 7, 2025, at the age of 78.

[3] He had previously been discharged days prior to his death after being treated for candidiasis.

[4] He was cremated at the Seoul Memorial Park(Korean: 서울추모공원) in Seoul and his ashes were buried at the Utopia Memorial Park(Korean: 유토피아추모공원) in Anseong on February 9, 2025.