Previous answer is
Mumei (attributed to Taima)
無銘(当麻)

Features: The Taima school, founded in the mid-Kamakura period, is closely associated with the Taima Temple in Nara. The Taima smiths, believed to have served the temple, produced many unsigned works. Signed pieces by Kuniyuki, the school's founder, exhibit a well-forged itame base, a calm suguha hamon with nie grains, and gentle sunagashi. However, many works from the Taima school, including this one, display a bolder, more intense style reminiscent of the Soshu tradition, with strong nie and prominent kinsuji.

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Appraisal Quiz #818 (October 26th, 2024)
Who made this sword do you think ?
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Blade Length: 57.0 cm (22.44 in)
Curvature: 1.6 cm (0.63 in)
Mekugi Hole: 1
Width at Base (Motohaba): 3.21 cm (1.26 in)
Width at Tip (Sakihaba): 2.13 cm (0.84 in)
Thickness of Rim (Kasane): 0.65 cm (0.26 in)
Sword Weight: 590 grams
Shape: With a wide blade, considerable thickness, deep curvature, and an extended tip, this sturdy piece has a length of 57 cm, approaching katana size, and is in excellent condition.
Jigane: The ko-itame (small wood grain) texture is well-forged with visible grain patterns and an irregular boshi pattern. The surface is detailed with itame-hada and is finely grained.
Hamon: The hamon consists of sharp-pointed sanbonsugi (three-cedar) in nie-deki, with streaks of kinsuji appearing intermittently.

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