"Koe o Kikasete" was written by Gorō Matsui and composed and produced by Tsugutoshi Gotō, marking the fourth consecutive single of Kudo to have resulted from a collaboration between the two.

Lyrically, the song describes a narrator trying to persuade her listeners to overcome their fears and cowardice, imploring them to speak up and not "close your heart off anymore".

[1] Kudo was praised for her presence on the record; she received acclaim for delivering vocals befitting of the genre with ease and critics noted that she was never drowned out by the "grand" backing orchestra of the Southern gospel-influenced track.

Japan's GyaO, held in celebration of her 30th anniversary, Kudo stated that "Koe o Kikasete" is one of the few songs whose recording she approached with a conscious desire to make her voice appear bigger and bolder, to match the intensity of the song.

It spent a total of 12 weeks in the top 100 and ranked at number 61 on the year-end Oricon Singles Chart.