This user has no status.
The shoes JYS is using are BTY Lezoline Groovy.
https://www.butterfly.co.jp/products/detail/93610.html
I have seen an interview where he tells the blade, weight and rubbers he uses. I remembered it was custom Petr Korbel blade and T05's on both sides. Well on Butterfly's site they state the same.
https://www.butterfly.co.jp/players/detail/jeoung-youngsik.html