Ordering number: 17458
Katana in Shirasaya (64th NBTHK Juyo Token)
Signature: Mumei(unsigned attributed as Sa Hiroyasu)
Sayagaki: written by Mr.Tanobe.
64th NBTHK Juyo Token Chikuzen Koku Sa Hiroyasu O-suriage Mumei.
The swordsmith has made a Tanto with a Sohe era(1346-1370) production date.
He is one of the swordsmiths who represent
the most prominent period of the Samonji school in the middle Nanbokucho period.
The blade is wide, O-Kissaki and full of energy in a brave form.
The Jinie is thick. There are Chikei. Notare base Ko-Gunome Midare and Kochoji Midare.
Boshi is Tsukiage(sharp) style. The Showed the character of this school.
(We divide 4 sections for each sword as Saijyo saku, Jyo-jyo saku Jyo saku and regular saku)
This sword belongs to Saijyo saku ranking.
The blade was polished.
Habaki : Gold failed Jsingle habaki.
Blade length: 67.1 cm or 26.42 inches.
Sori :1.4 cm or 0.55 inches.
Mekugi : 3 (1 Umeru)
Width at the hamachi : 3.28cm or 1.29 inches.
Width at the Kissaki : 2.47 cm or 0.97 inches.
Kasane : 0.73cm or 0.29 inches.
The weight of the sword 740 grams.
Era: Nanbokucyo period of 1366. 650years ago.
Shape : O-suriage mumei and wide and thick sakihaba is also wide Big Kissaki gorgeous shape.
On the front, Bo-hi and Soehi are engraved. on the backside, on the back, double Hi are engraved.
Jigane :Koitaame had well grained with jinie attach and long Chikei work.
Hamon :Konie deki choji midare, gunome midare work and then gunome midare choji midare
with ash soft nioikuchi habuchi. Inside of the Hamon, sunagashi, kinsuji work.
Bo-shi is thick nioikuchi midarekomi with sunagashi kinsujiturns back sharply
Special feature: Sa is called Saemon Saburo who was one student of Masamune 10 student members.
The subject is bright and clear nice Jigane.
From Aoi Art: Sa was one of the students of Masamune and many students.
Sa Yokihiro was a student of the Sa who was working at Nanbokuchyo 1366 Syohei 20th.
According to the Tanobe sensei’s Sayagaki, this sword is a masterpiece of Hiroyasu.
especially long Chikei and many sunagashim kinsuji in Hamon quite nice.
64th NBTHK Juyo Token.
Aoi Art estimation paper: whole Oshigata.