시대별로 장르나 멜로디의 변화가 커서 알기 쉬운
반면에 J는 음악만으로 시대를 구분하기 쉽지 않을 만큼, 전체적으로 변화가 없다
時代別でジャンルやメロディーの変化がカーソルー分かりやすい
<iframe width="1088" height="612" src="https://www.youtube.com/embed/Rfiks_VNU-0" title="年度別代表韓国歌 (1982‾2024)" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>
一方に Jは音楽だけで時代を区分しやすくない位, 全体的に変化がない
<iframe width="802" height="451" src="https://www.youtube.com/embed/IAFCFfmj17M" title="年度別人気/有名日本歌集め (1978‾2022)" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>