Ordering number:23392
Katana in Shirasaya (NBTHK Tokubetsu Hozon Token)
Inscription: Mumei (Ko Mihara)
無銘(古三原)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyo Jyo Saku ranking.
Polished Blade – Superb polishing has been applied to this work.
Habaki: Silver foiled double Habaki.
Blade Length: 2 shaku 3 sun 3 bu (approx. 70.3 centimeters) 27.7 inches.
Curvature: 7 bu (approx. 2.1 centimeters) 0.83 inches.
Mei-nuki-ana (Peg holes): 3 holes
Motohaba (Width at base): 2.92 centimeters 1.15 inches.
Sakihaba (Width at tip): 2.14 centimeters 0.843 inches.
Kasane (Blade thickness): 0.65 centimeters 0.26 inches.
Total Weight: 690 grams
Period: Late Kamakura period
Shape: Osuriage Mumei Katana. Wide blade with large Sori and longer Kissaki.
Jigane: Ko Itame Hada well grained with Jinie attach. The Jigane is beautiful.
Hamon: Ko Nie Deki, Suguha Hamon with Ko Ashi and thick Nioikuchi. Boshi is round shape.
Features: This work is from an unknown smith in the ancient Mihara-Sanbara lineage or possibly a predecessor.
Aoi Art’s Comment: The polishing of this sword is exceptional, bringing out the beauty and clarity of the steel. The blending of the ground metal (ji) and patterned metal (hamon) suggests it might be a pure forged blade. The surface texture resembles the clear steel of the Aoe school. There is a vertical crack on the kissaki (tip), but it is not a major concern. Overall, it is a highly recommended top-quality Kosanbara.
Historical Background: During the later period of the Kamakura era, transportation flourished nationwide, and ports became vibrant, giving rise to economically powerful samurai. The dissatisfaction towards the Hojo clan, who sought to strengthen their power, gradually intensified. Emperor Go-Daigo aimed to regain political control of the court and eventually overthrew the Kamakura shogunate by gaining support from newly
emerging samurai and retainers.
NBTHK Tokubetsu Hozon Token
Aoi Art estimation paper
Whole Oshigata
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