T. Ishikawa, brilliant and essential as always, sent along this Youtube video of the song Sayonara no Natsu, which is the theme song to Studio Ghibli's upcoming Kokuriko-Zaka Kara. This song was originally written in 1976, and this recording is sung by Ryoko Moriyama.
This is not the 2011 version sung by Aoi Teshima, but an older recording. Studio Ghibli's rendition will be released on June 1, and the soundtrack CD on July 1. The song is already available for mobile phones.