Japanese natural whetstones Blue Aoto BA2
Good quality small size soft Aoto medium sharpening for knives or tools.
One crack in the lower middle as in the image but has been secure with washi paper and multiple coat of urushi lacquer around the stone. Does not affect much of sharpening.
One of the best feedback and true "sharpening stone feel" Aoto.
Size: 181mm(L) x 60mm(W) x 30mm(H)