"Shout It Out" is the twenty-second single by Japanese recording artist Alisa Mizuki.

The title track is a Japanese-language was written by Gorō Matsui and composed and produced by Incognito members Jean-Paul 'Bluey' Maunick and Matt Cooper.

The demo Maunick and Cooper sent Mizuki initially had English lyrics, however Matsui wrote Japanese lyrics for the song, at the request of Mizuki's team.

The B-side, "Eternal Space," was written by Emi Miyamoto and composed by house trio GTS member Gee.

CDJournal described "Shout It Out" as "resort music-esque" and "Eternal Space" as an "Eiichi Otaki-inspired summer track," noting that both songs showcased a "new and fresh" side of Mizuki.