Amakuni legendary swordsmith who supposedly created the first single-edged longsword with curvature along the edge in the Yamato Province around 700 AD Akitsugu Amata (1927–2013) Hikoshiro Sadamune (1298–1349) Kanenobu (17th century) Kenzō Kotani (1909–2003) Masamune (c. 1264 – 1343) Muramasa (16th century) Nagasone Kotetsu (c. 1597 – 1678) Okubo Kazuhira (born 1943) Shintōgo Kunimitsu (13th century) Masamine Sumitani (1921–1998)