A new song written specifically as the theme song for the "JO1 Exhibition"JO1 in Wonderland!"

Member Takumi TAKUMI is in charge of all the lyrics, composition and production for the first time.

The title "HAPPY UNBIRTHDAY" was inspired by a line from "Alice in Wonderland," "Happy Unbirthday," and the lyrics contain a look back at JO1's history and a message about moving forward, looking only forward.

A funk x Hip Hop sound and the vocals of all 11 members evoke the feeling of showtime in this playful song.


Download here