安全地帯 (玉置浩二) - 行かないで [Ikanaide] (English Lyrics + Romaji) 

I do not own the music or images in this video.
Sang by Tamaki Koji, one of the best singers in Japan and vocalist of the band Anzen Chitai. This song "Ikanaide" or "Don't Leave" is one of his single masterpieces and is so sorrowfully yet beautifully done with gorgeous strings accompanying his gentle voice. One of my all time favorite songs.
Hope you enjoy!