sixxxxxx is the sixth extended play by Japanese recording artist and songwriter Ayumi Hamasaki.

The EP was released on August 5, 2015, by Avex Trax and was produced by long-time collaborator Max Matsuura.

The photoshoot was created in conjunction with Numero Tokyo Magazine, with a theme of "Ayumi Hamasaki Moto."

[6] The title allegedly suggests that this is Hamasaki's sixth extended play and that it features six original tracks.

[7] Hamasaki confirmed that stage production and costuming had begun and announced the tour throughout Japan, including the Osaka, Tokyo, and Fukuoka.