Good-Bye (Sakanaction song)
"Good-Bye" (Japanese: グッドバイ, Hepburn: Guddobai) is a song by Japanese band Sakanaction. It was released as a single in January 2014, as a double A-side single with the song "Eureka". A rock ballad primarily based around non-electronic instruments, the song was composed by the band's vocalist Ichiro Yamaguchi about his mental state while physically unwell and mentally frustrated, after being unable to finish writing the song "Sayonara wa Emotion". In January 2014, a remix of the song was used in the NHK documentary program Next World: Watashi-tachi no Mirai, later to be included on the band's compilation album Natsukashii Tsuki wa Atarashii Tsuki: Coupling & Remix Works (2015).
The physical single debuted at number two on Oricon's weekly singles chart, while "Good-Bye" outperformed "Eureka" on the Billboard Japan Hot 100, also reaching number two. Critics received the song well, praising the song for its simple band sound that developed with the additional of guitar feedback, and believed that the song was an expression of a musician reaffirming their identity and their desire to continue into uncharted musical territory.
