Previous answer is
Mumei(Unsigned)(Ko-kyomono)
無銘(古京物)

Special Feature:　"Kokyo-mono" refers to old Yamashiro works produced from the late Heian to early Kamakura period.
Famous swordsmiths of the Yamashiro region during this era include Sanjo, Gojo, and Awataguchi.
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Appraisal Quiz #836 (March 1st, 2025)
Who made this sword do you think ?
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Habaki: Gold-plated single-layer.
Blade Length: 22.4 cm (8.82 in).
Curvature: Inward curvature.
Mekugi Hole: 2.
Width at Base (Motohaba): 2.30 cm (0.91 in).
Thickness of Rim (Kasane): 0.68 cm (0.27 in).
Sword Weight: 150 g.
Shape: Thick Kasane with inward curvature, featuring a Bo-hi.
On the omote side, two grooves are carved.
Jigane: Well-forged ko-itame hada with a refined texture.
Hamon: A beautiful suguha hamon with small nie.

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Answer will be posted at next Appraisal Quiz.

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