Ordering number : 18133
Katana in Shirasaya with Koshirae(49th NBTHK Juyo Paper)
Signature : Koyama Munetsugu
Tenpo 10 Nen 3 Gatsu Hi(March 1839)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This blade belongs to Saijo Saku ranking.
The blade was polished.
Blade length : 71.05 cm or 27.97 inches.
Sori : 1.45 cm or 0.57 inches.
Width at the hamachi : 2.95 cm or 28.14 inches.
Width at the Kissaki : 2.15 cm or 0.84 inches.
Kasane : 0.61 cm or 0.24 inches.
Era : Edo period, around Tenpo era 1839.
Shape : Relatively narrow, thick blade with large Sori.
Jitetsu :Ko-Itame Hada well grained with Jinie attach.
There are some Mokume Hada. There are Chikei.
Hamon : Nie Deki, Choji base, Gunome Midare with long Ashi.
The Hamon is brilliant. The Kioikuchi is thick.
In Ha, there are Kinsuji and Sunagashi.
Boshi is small round Hakikake shape.
Special feature : Koyama Munetugu was born at Mutsu Shirakawa province as a son of Koyama Munehira.
His name was Soubei.
He was working for Matudaira Daimyo family as a sword making Samurai.
He moved to Kuwana province with his master and then he moved to
Edo Tenpo 2 nd year.At that time he was high reputation of cut well
swords maker. some times we found his swords which was done
Saidanmei and also possession name on the tang of the blade.
Generally speaking the quality of Munetsugu is one of the top sword
smith in late Edo period and without any faults among his swords.
Tsuba : Round shape iron Tsuba, gentians are engraved with open work.
Fuchi: Shakudo Nanako, birds are engraved with gold color.
Kashira : Black horn.
Saya : Black Ishimeji Saya.
Menuki : Shakudo, dragon is engraved.
From Aoi Art: This blade has pointed and squared Choji Midare and Gunome Midare Hamon
with long Ashi. In Ha, there are many Ashi and Sunagashi. This blade is masterpiece of Tenpo Uchi.
We strongly recommend this sword for you.
49th NBTHK Juyo Paper
Aoi Art estimation paper : whole Oshigata.