60ろくじゅう年ねん代だいMeanings1nounthe '60s; the sixtiesRefers to the decade of the 1960s. Can be used for any century, but typically means the 20th century 1960s unless context specifies otherwise.60年ねん代だいの音おん楽がくが好すきです。I like music from the '60s.彼かれは60年ねん代だいに生うまれました。He was born in the sixties.