There have been various versions of "Jidai" but the version at the link below is, by far, my favourite rendition by her. I can pretty much guarantee some listeners may get that lump in their throats just from the melody and Nakajima's delivery.
The single also became part of her first album, "Watashi no Koe ga Kikoemasuka"(私の声が聞こえますか....Can You Hear My Voice?) in April 1976. It peaked at No. 10 but remained a long seller on the charts, becoming the 34th-ranking album of 1978.