Epic Day is the nineteenth[1] studio album by the Japanese rock duo B'z.

It came after a hiatus in which the members released solo projects, including vocalist/lyricist Koshi Inaba's Singing Bird and guitarist/composer Tak Matsumoto's New Horizon.

[2][5] It was the first time that a B'z album had been released in the vinyl format since the band's early days.

The opening track "Las Vegas" received a promotional video and will be used as the official song of the Japanese leg of the 2015 Red Bull Air Race World Championship season.

[6] All lyrics are written by Koshi Inaba; all music is composed by Tak Matsumoto, all songs co-arranged by bothB’z LIVE-GYM 2012 -Into Free Extra- at Osaka-jō Hall ^ Shipments figures based on certification alone.