"Sayonara Kizu Darake no Hibi yo" (さよなら傷だらけの日々よ, lit.

"Goodbye Badly Injured Days") is the song and forty-eighth single by Japanese hard rock band, B'z, released on April 13, 2011.

Limited edition includes DVD with the music video for the song.

It also reached number one on the Billboard Japan Hot 100 and the Top Singles Sales chart.

[4] Although original release date was March 30, 2011, it was postponed because of the 2011 Tōhoku earthquake and tsunami.