Ordering number: AS19189
Katana in Shirasaya with Koshirae.(NBTHK Hozon Token)(NBTHK Tokubetsu Kicho Token)(Koshirae: Tokubetsu Kicho Tosogu)
Signature(NBTHK Hozon): unknown (shimada)
Signature(NBTHK Tokubetsu Kiccho): Mumei (Naoe)
Sayagaki: written by Dr. Kanzan.
Naoe Shizu, Ubu Mumei, typical and healthy blade.
Blade length is 2 Shaku 3 Sun 4 Bu.
This is a legacy of the Matsumoto family of Gunma prefecture.
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyo Jyo ranking.
The blade was polished.
Habaki :Silver single habaki.
Blade length: 70.8cm or 27.87 inches.
Sori : 2.2cm or 0.86 inches.
Width at the hamachi: 3.06cm or 1.20 inches.
Width at the Kissaki: 2.21cm or 0.87 inches.
Kasane : 0.68 cm or 0.26 inches.
The weight of the sword 745 grams.
Era : Late Muromachi period.
Shape : Rather wide and thick Katana with large Sori, longer Kissaki.
There are engraving of Ken, dragon, Dokko, double Hi and sanskrit.
Jigane : Ko Itame hada and Ko Mokume Hada mixed with Jinie attach.
There are fine Chikei. The Jigane has soft feeling.
Hamon : Nie Deki, Suguha Hamon base and Ko Gunome Midare with Ko Ashi. There are fine Kinsuji.
Boshi is Notare, small round shape, and Hakikake style.
Special feature: Shimada school is a decedent from Soshu school.
They interacted with Soshu swordsmiths near Odawara.
They are strongly influenced by it and produce similar swords.
Koshirae : Handachi Koshirae. (NBTHK Tokubetsu Kicho paper)
Saya : Kawari Nuri Saya.
Tsuba: Iron Tsuba, Myoga Tomoe design is engraved with brass inlay.
Menuki: Shakudo, Shishi dog is engraved.
Fuchikashira: Kojiri: Shakudo, the wave is engraved.
From Aoi Art: The blade has two NBTHK certificates.
One NBTHK Tokubetsu Kicho paper says Naoe, the other NBTHK Hozon Paper says Shimada. It is 2 different schools at all, we think the Shimada school faction is probably the correct answer.
NBTHK Hozon paper
NBTHK Tokubetsu Kicho paper
NBTHK Tokubetsu Kicho paper for Koshirae
Aoi Art estimation paper