She debuted as a singer on April 8, 2015, with the song "Maegami Kirisugita," which was produced by Japanese musician Yasutaka Nakata.
In conjunction with the release, she had contributed the theme song to the Japanese romantic movie "Koisuru Vampire" titled "Colony".
In September 2015, Mito released her second single, "8-bit Boy", which was used as the main theme to the Japanese premiere of the American movie Pixels.
Its B-side track, "Watashi wo Fes ni Tsuretette", was released as a separate digital single and has received a music video.
In May 2016, a song titled "Odekake Summer" was released in a form of music video to promote a Japanese mosquito repellent brand.