Board Thread:General Discussion/@comment-1915363-20150721104031/@comment-26848183-20150806113132

According to the pixiv encylopedia:

The song's genre is officially listed as enka. It is composed closely to genres like Mood Kayou and POPs Enka, which were enka genres popularized after the 2000's with songs such as Hatsune Miku's Senbonzakura.