Japanese Swordsmithing Craft

Timeline

1. 901–1000Kinai and Kawachi Province · Osaka PrefectureAround the 10th century Japanese swords shifted from straight blades in the Chinese Tang style toward the curved tachi; fold-forging and steel-wrapping techniques matured, establishing the basic technical path of the later Japanese sword.
2. 1021–1030Swordsmith workshops around Heian-kyō · Kyoto CityIn the early 11th century demand for tachi from the court and temples increased; smith lineages such as Sanjō Munechika rose in Kinai, forging techniques and the inscription system gradually standardized, and swords served both combat and ceremonial functions.
3. 1185–1333Kamakura and Bizen Province · Okayama PrefectureThe rise of warrior rule drove a surge in demand for combat swords; master smiths emerged in Kamakura, Bizen, and elsewhere, the katana form became widespread, and forging, quenching, and polishing techniques reached a historical peak.
4. 1876Japanese archipelago · JapanFrom the Meiji era onward the Japanese sword shifted from a combat weapon to a craft art and cultural heritage; modern smiths make blades by ancient methods and receive cultural property protection certification, and the forging craft continues through master-apprentice systems and museum collections.