Previous answer is
Mumei (Shikkake)
無銘(尻懸)

Features: The Shikkake School, one of the five major Yamato traditions, flourished under Norinaga, who is regarded as its effective founder. Existing tanto signed by Norinaga and inscribed with his age—48 in Bunpo 3 (1319) and 69 in Ryakuo 3 (1340)—indicate that he was born in Bun'ei 7 (1270). Later generations also inherited the same name during the Muromachi period. The characteristic workmanship of the Shikkake School includes a high shinogi, broad mihaba, flowing itame hada, and a suguha-based hamon, all representative of the Yamato tradition. Distinctively, however, the hamon often incorporates conspicuous ko-gunome, giving the school its own unique identity. Although this blade has been o-suriage and additional mekugi-ana have been made over time, the machi-okuri and overall proportions indicate that it was originally forged as a tachi. Its broad construction, high shinogi, flowing itame hada, and suguha mixed with ko-gunome clearly justify its attribution to the Shikkake School.

=====================================
Appraisal Quiz #909 (August 8th, 2026)
Who made this sword do you think ?
=====================================

Blade Length: 68.1 cm (26.81 in).
Curvature: 2.0 cm (0.79 in).
Mekugi Hole: 1.
Width at Base (Motohaba): 3.19 cm (1.26 in).
Width at Yokote: 2.27 cm (0.89 in).
Thickness of rim (Kasane): 0.70 cm (0.28 in).
Sword Weight: 715 g.
Shape: A powerful katana with a wide mihaba, thick kasane, and a large extended kissaki. Deep bohi are carved into the blade, and the steel displays a remarkably fine masame-hada.
Jigane: Well-forged masame-hada with active chikei, producing a strong and vibrant steel. The beautifully developed masame grain is especially noteworthy.
Hamon: Beginning near the hamachi with large gunome-midare, the temper pattern becomes even broader and more relaxed toward the kissaki. Kinsuji are active throughout the hamon.

=====================================

Answer will be posted at next Appraisal Quiz.

=====================================

(Please acknowledge not replying to mail about Appraisal Quiz by our convenience.)