By this time the quality of the blade was better. It was the time when professional smiths appeared and there were several styles of tantō making. The best known smiths were: Sukesada and Norimitsu (Bizen-den); Kanemoto and Kanesada (Mino-den); Muramasa and Masashige (Ise). The beginning of Edo period (1603-1867 A.D.) was a period of relative peace after Japanese unification and, although not so many were made, they were of good quality. The heat treated blade's edge (hamon) becomes more waved and so more beautiful.