In any case, depending on the time zone, you may already be reading this on June 1 2015 in which we can all celebrate the 35th anniversary of Naoko Kawai's（河合奈保子）debut release. Yep, it was on this day in 1980, just shy of her 17th birthday that the native of Osaka came to the ears of the listening public for the first time with "Ohkina Mori no Chiisana O-uchi" (The Little House in the Big Forest). Apparently in December 1979, Kawai had barely gotten in her application and a demo tape for "Hideki no Ototo/Imoto Boshuu Audition" （HIDEKIの弟・妹募集オーディション...Hideki Saijo's Little Brother/Little Sister Recruitment Audition） after which some 6 months later, she actually won the championship, and then a few months after that was the debut.
The judges chose wisely in my estimation. I've heard "Ohkina Mori no Chiisana O-uchi" a few times since I got Kawai's BEST album, and that clear voice of hers was there right from the start. It just seemed to smile for me (an inside joke) right then and there. And it didn't hurt that Koji Makaino's（馬飼野康二）melody had that sweet but soaring feeling overlaid on a disco beat. As for Yoshiko Miura's（三浦徳子）lyrics, I think that wonderful house from the title is referring to the heroine's welcoming heart for that guy she likes. Considering her cute looks (especially with and not in spite of her snaggletooth) and that happy delivery, I'm fairly sure that there were quite a few guys who would have been more than ecstatic to answer the greeting.
For a debut, Kawai did pretty decently as the song peaked at No. 36. It was also a track on her debut album, "Love", which came out later that same year in October. Of course, bigger and better things were on the horizon for her.
As for which song she provided on her demo tape...it was Anri's（杏里）"Olivia wo Kikinagara"（オリビアを聴きながら）.