Previous answer is
Mumei (Unju)
無銘(雲重)

Features: The swordsmiths Unshō, Unji, and Unju were active in the Ukai area of Bizen province from the late Kamakura to Nanbokucho periods.
They are said to have descended from Unshō, the founder.
This school is also referred to as the Ukai-ha or Ugami-ha, depending on the kanji used, and is collectively called the “Un” school due to the common character “雲” (Un) in their names.
Their works differ significantly from typical Bizen swords, often showing characteristics of Yamashiro or Aoe styles, and sometimes with a Yamato influence.
Notably, their jigane tends to show itame and mokume with pronounced utsuri, and their boshi are typically rounded.

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Appraisal Quiz #868 (October 11th, 2025)
Who made this sword do you think ?
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Blade Length: 2 shaku 3 sun 2 bu – 70.3 cm (27.68 in)
Curvature: 5 bu – 1.5 cm (0.59 in)
Mekugi Hole: 1
Width at Base (Motohaba): 2.95 cm (1.16 in)
Width at Tip (Sakihaba): 2.09 cm (0.82 in)
Thickness of rim (Kasane): 0.66 cm (0.26 in)
Shape: Slightly wide blade with koshi-zori (curvature near the base), typical tachi style.
Jigane: Itame hada mixed with mokume hada, with visible ji-nie and midare utsuri.
Hamon: Choji-based with gunome midare, including pointed elements. Well-defined ashi and yo appear. The boshi is midare with a yakitsume tip.

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