Ordering number : 19308
Katana in Shirasaya with Koshirae(NBTHK Tokubetsu Hozon Token)
Signature : Mumei attributed to Ko Mihara
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyojyo saku ranking.
The blade was polished.
Habaki : Gold foiled single Habaki.
Blade length : 71.4 cm or 28.1inches.
Sori : 1.2 cm or 0.47 inches.
Mekugi : 3
Width at the Hamachi : 2.98 cm or 1.17 inches.
Width at the Kissaki : 1.98 cm or 0.78 inches.
Kasane : 0.64 cm or 0.25 inches.
The weight of the sword 755 grams.
Era : Late Kamakura period.
Shape : Osuriage Mumei, the sword is wide and thick, and has Bohi on both sides. The Kissaki is long and the Sori is deep.
Jigane : Itame-hada mixed with Mokume-hada. Jinie attached. Shirake Utsuri apparent.
Hamon : Niedeki, Suguha with short Ashi. Partially Nijuba. The Boshi is Maru, but the top is kind of pointed.
Special Feature : Ko Mihara is the sword school that was active in Mihara of Bizen province from the late Kamakura to Nanbokucho period.
Masaie and Masahiro were representative swordsmiths of the school.
In Mihara area, there were some manors of Yamato province and these 2 provinces interacted with each other, and it’s believed that this is why Mihara school swords resemble Yamato swords. But unlike Yamato swords, Mihara school swords have Nie less but Shirake-Utsuri and Mokume-Hada apparent more. also Nioikuchi is tighter and Boshi is rounder.
Tsuba : Mokko shaped iron Tsuba, Shishi dog and peony carving.
Fuchikashira : Shakudo Nanakoji, Shishi dog and peony carving.
Saya : Black roiro Saya, gold Shishi dog and peony painting.
Menuki : Shishi dog carving.
From Aoi Art : This sword is Osuriage Mumei, the Jigane is grained very well and there Utsuri, it looks like Aoe school swords.
The Hamon is Suguha with short Ashi called Nezumi-Ashi(lit. rat’s legs).
The Koshirae features Shishi dog and peony, it goes really well with the sword.
NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.