Previous answer is
　 Awataguchi Fujiwara Tadatsuna (First generation)
粟田口藤原忠綱(初代)　

Special feature : his sword depicts a turbulent sea-like appearance with a deep nioiguchi, displaying vigorous upper and lower movements, showcasing exceptional craftsmanship. The boshi (tempered edge) is round and pointed, returning towards the center.
The original homeland of this sword is Himeji, Harima Province. The distant ancestor is Awatagutaguchi Kunitsuna, who migrated to Kyoto and later came to Osaka.

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Appraisal Quiz #759 (September 9th, 2023)
Who made this sword do you think ?
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Blade Length: 2 shaku 1 sun 8 bu (66.1 cm) / 26.02 inches
Curvature: 5 bu 5 rin (1.67 cm) / 0.657 inches
Mekugi-ana: 1
Width at Base: 3.05 cm / 1.20 inches
Width at Tip: 2.09 cm / 0.82 inches
Thickness: 0.7 cm / 0.28 inches
Sword Weight: 640 grams
The overall form of the sword has a balanced body width and thickness, and its
curvature adds to its well-proportioned appearance. The grain pattern (jihada) features a
mix of itame hada and mokume hada on the surface, creating a beautiful texture.
The temper pattern (hamon) consists of a midare pattern with ashi and yō, producing a lively
and dynamic edge.

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