Ordering number : 19373
Tachi in Shirasaya (48th NBTHK Juyo Paper)
Signature: Shigetsugu (Ko Aoe)
Sayagaki: written by Mr. Tanobe.
48th NBTHK Juyo Paper
Bicchu Koku Ko-Aoe Shigetsugu
Suriage, two Kanji characters signature.
There are two blades that have the Katana-Mei side signature.
One is the signature”Shigetsugu” is above the Mekugi hole.
This Tachi’s 2nd Mekugi hole is Ubu-Ana.
Originally, the signature is below the Mekugi hole.
The original length was 2 Shaku 5 Sun.
The blade is Ko-Midare Hamon base, impressive and classical.
The blade length is 2 Shaku 3 Sun.
Koto: Jyo Saku: Bicchu
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Saijo Saku ranking.
The blade was polished.
Habaki : Gold foiled double habaki.
Blade length : 71.5 cm or 28.14 inches.
Sori : 0.8 cm or 0.31 inches.
Mekugi : 2
Width at the hamachi : 2.89 cm or 1.13 inches.
Width at the Kissaki : 1.78 cm or 0.70 inches.
Kasane : 0.58 cm or 0.22 inches.
The weight of the sword:660 grams.
Era : Kamakura period around Koan era(1278)
Shape : Regular width and thickness Katana with small Sori. Utsubuse Gokoro.
Jigane : Ko Itame Hada and Ko Mokume Hada well grained with Jinie attach.
Tehre are Utsuri. The Bo-Hi on the both side of the blade.
Shinogi-Ji: Itame and Mokume.
Hamon : Nie Deki, Suguha and Notere Ba. The Nioikuchi is soft.
In the Ha, there are Ashi, Yo, Sunagashi and Kinsuji.
Boshi is large Notare round shape.
Special feature: Bicchu koku Aoe school began in late Heian period Keian era(1171).
Shigetsugu was a sword craftsman in middle Kamakura period and famous craftsmen called Ko-Aoe
such as Moritsugu, Tametsugu, and Tsunetsugu also worked at the time.
Their Hamon is Suguha base, some time has calm Ko-Midare.
Generally, Aoe school signature on the Haki-Ura side of the Nakago.
The Yasurime is O-Suji Chigai. It is different from Ko-Bizen school.
From Aoi-Art: As surviving articles of Ko-Aoe Shigetsugu is
Tachi(Important arts(recognized by the state)), three Kanji characters “Kanetsugu Saku”.
That is a legacy of the Kishu Tokugawa family .
There are two other Shigetsugu’s Important art swords.
All of these sword’s signature on the Haki-Omote side of the Nakago.
This signature is on the Haki-Ura side. It is same as Ko-Aoe school.
There are a lot of works in the Ha.
We recommend this sword for you.
48th NBTHK Juyo Paper
Aoi Art estimation paper: whole Oshigata.