Break All Day!

is the eighteenth single by Japanese recording artist Alisa Mizuki.

It was written by Cathy Dennis and Stargate members Hallgeir Rustan, Tor Erik hermansen and Mikkel Eriksen, while the Japanese lyrics were written by Kenzō Saeki.

The cover was produced by Hideki Fujisawa, credited as Dance Man.

The song served as theme song for the first half (episodes 1–14) of the third season of the Fuji TV drama Nurse no Oshigoto, which stars Mizuki in the lead role.

The B-side, "Shake Love," was written by Kentarō Akutsu and composed and produced by Tourbillon keyboardist Hiroaki Hayama.