Natsu Hiraku Seishun

 is the ninth single released by Yamaguchi Momoe.

It was released on June 10, 1975.

Single Information

 * Catalog Number: SOLB-280
 * Lyrics: Senke Kazuya (千家和也)
 * Composition: Tokura Shunichi (都倉俊一)
 * Arrangement:
 * Track 1: Hoguchi Yusuke (穂口雄右)
 * Track 2: Makaino Koji (馬飼野康二)

Tracklist

 * 1) Natsu Hiraku Seishun (夏ひらく青春; Youth Blooms in Summer)
 * 2) Ai ga Hitotsu Areba (愛がひとつあれば; If There's Only One Love)