Tachi by Aoe Sadatsugu

Aoe Sadatsugu was a master smith of the Aoe school, based in Aoe, Bitchu Province (present-day western Okayama Prefecture), during the mid-Kamakura period. He is counted among the three preeminent smiths of the Aoe school, alongside Tsunetsugu and Tsugunao. Though Aoe blades resemble Bizen swords in appearance, they are distinguished by their characteristic sumihada (clear skin) and sumikan (clear sensation)—the refined beauty of a subtly blue-tinted jigane paired with the dignified character of a gentle hamon. This tachi exhibits a blade length of approximately 76 centimeters and preserves the dignified tachi form of the mid-Kamakura period. The hamon displays the Aoe school's signature serene composition: gentle ko-midare punctuated by ko-gunome, with restrained ko-nie and nie-ashi visible within the hardened edge. The jigane features densely compacted itame jihada, suffused with Aoe's characteristic sumihada—a delicate blue-gray jinie that extends throughout the steel. The nakago is signed with the mei "Aoe Sadatsugu." A masterwork bearing the same signature, "Tachi with Mei Sadatsugu," is preserved as a National Treasure in the Tokyo National Museum. Aoe blades were highly prized among daimyo families and, owing to their harmony with tea ceremony aesthetics, numerous records document their acquisition by discerning daimyo collectors.