Previous answer is
Mumei (Aoe , 青江)

Features: Aoe school was a swordsmith school in Bicchu. Works made until mid-Kamakura period are called Ko(old)-Aoe, and later works are simply called Aoe. The blade pattern of this work is bright and shining Nioi-base Suguha, which is characteristic of Aoe. In contrast, the old Aoe has a Ko-nie base Suguha.

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Appraisal Quiz #838 (March 15th, 2025)
Who made this sword do you think ?
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Blade Length: 2 shaku 2 sun 3 bu 5 rin (67.7 cm / 26.65 in)
Curvature: 6 bu 5 rin (1.97 cm / 0.78 in)
Mekugi Hole: 1
Width at Base (Motohaba): 3.37 cm (1.33 in)
Width at Tip (Sakihaba): 2.38 cm (0.94 in)
Thickness (Kasane): 0.73 cm (0.29 in)
Sword Weight: 765 g
Shape:A wide blade with a firm thickness and slightly deep curvature.
The boshi (tip) is long and well-formed, with a good volume of meat (niku).
Jigane:Finely forged ko-itame hada, characteristic of Osaka-jigane.
Hamon:A nioi-based suguha with a very deep nioiguchi.
It has a misty appearance with ashi entering, featuring sunagashi and kinsuji.
The boshi is rounded, with a deep nioiguchi that sweeps back softly.

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