KankenOnline/kanken_online/static/kanji.css

ul#reading-list {
    list-style-type: none;
}

#goon::before {
    content: "呉";
}

#kanon::before {
    content: "漢";
}

#kanyoon::before {
    content: "慣";
}

#soon::before {
    content: "宋";
}

#toon::before {
    content: "唐";
}

#on::before {
    content: "音";
}

#kun::before {
    content: "訓";
}