さよならだけが人生だ (Sayonara Dake ga Jinsei da)

Background
It would be best if we could share loneliness, and the greatest solution would be if we could swallow it down. Isn't that all life is?

"Sayonara Dake ga Jinsei da" is an original song by Itou Kashitarou featuring Hatsune Miku. It is his most notable VOCALOID-related work.

This song has entered the Hall of Fame.