Kyoku for Men Pore Reducing Serum A common problem for mens skin is the large pore size which can lead to uneven skin tone. After years of research the most precious Japenese plants have been combined to combat pore size in the form of Kyoku for Men Pore Reducing Serum. A combination of licoriceroot & eijistu rose work to eliminate blackheads & pore size. Apply twice a day to face & neck after cleansing.