Birthday (Gentouki album)

 is the fifth major studio album by Gentouki, released on September 21, 2016. The album has the official names "Tanjoubi" and "Birth Day", meaning the day of being born, rather than the anniversary of birth. It includes a cover of the Kaoru Miyazaki song "Bye-Bye" and a bonus acoustic version of the single "Sutekina, Ano Hito". "Tanjoubi" is Gentouki's first release since the best-of album in 2007. This album, as well as past Gentouki albums, features artwork by illustrator Yusuke Nakamura.
Track listing.
All words and music written by Jun Tanaka.