Sayonara no Natsu ~ Coquelicot-zaka Kara ~ Teshima Aoi [Vietsub]

Vocal: Teshima Aoi

Coquelicot-zaka kara (Kokuriko-zaka kara) Main Theme song 

Full lyrics here: Sayonara no Natsu Lyrics

[Vietsub] Sayonara no Natsu ~ Coquelicot-zaka kara–Teshima Aoi

Composition: Sakata Koichi
Lyrics: Yukiko Marimura
Vocal: Teshima Aoi

From anime movie “Coquelicot-zaka Kara” (Studio Ghibli – 2011).
Original Vietsub by Tama

Ue wo Muite Arukou–Sakamoto Kyu

Compostion: Nakamura Hachidai
Lyrics: Ei Rokusuke
Vocals: Sakamoto Kyu

It is commonly mistaken as “Sukiyaki”, though I don’t know the reason why.