Hitomi Ishikawa (石川ひとみ)had been an aidoru (pop idol) for 3 years before she got "Machibuse", her biggest hit. The song was written by New Music legend, Yumi Matsutoya (nee Arai), and it had actually been written originally for a singer by the name of Seiko Miki, who had a very brief career in the mid-70s.
The title "Machibuse" is translated as "ambush", a pretty aggressive name for an aidoru song, but going over the lyrics, it's much more of a wistful story of unrequited love.
My personal memory of Ishikawa and "Machibuse" was when I was watching my very first viewing of the Kohaku Utagassen when she was the 2nd woman singer to appear after Naoko Kawai. Halfway through the song, she crumpled into a bag of tears since she was so happy to appear on the programme. I guess her emotions "machibuse"ed her.