Katana signed Bishu Osafune Tadamitsu, a Bizen school smith of the late Muromachi period, active around 1500.
Bishu Osafune was the dominant production centre of Bizen province; Tadamitsu worked within the prolific Osafune lineage at a moment when the school’s output was enormous and technically consistent. Bizen blades of this era typically show a tight, fine itame hada with ji-nie and a chōji or gunome-chōji hamon with nioi. Attribution to a named Osafune smith of this period is significant; Fujishiro’s Nihon Toko Jiten lists several generations of Tadamitsu across the late Muromachi.
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