Ordering number :17325
Katana in Shirasaya(62nd NBTHK Juyo Paper)
Signature : Mumei(Sa Hiroyuki)
Sayagaki: written by Mr. Tanobe.
62th NBTHK Juyo Paper. Chikuzen Koku Sa Hiroyuki.
Suriage Mumei. Nanbokucho period around Enbun or Joji era.
The shape showed a strong characteristic.
The Hamon is Ko Notare base with Gunome Midare and thick Nioikuchi.
This blade is typical Samonji school.
Blade length is 74.1cm.
(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 : 74.1 cm or 29.17 inches.
Sori : 1.7 cm or 0.66 inches.
Mekugi : 3
Width at the hamachi : 3.22 cm or 1.26 inches.
Width at the Kissaki : 2.57 cm or 1.01 inches.
Kasane : 0.68 cm or 0.26 inches.
Era : Middle Nanbokucho period.
Shape : Suriage Mumei Katana. Wide and thick blade with large Kissaki.
There is a Bo-Hi and Soe-Hi on the blade.
Jitetsu : Itame hada and mokume hada and also koitame hada mixed
with thick jinie attach chikei work.
Hamon : Niedeki Ko-Notare and Suguha mixed with thick nioikuchi
and many sunagashi and Kinsuji scatter. Boshi is Togari shape.
Special feature : Samoji (samonji) started from early Nanbokucyo period by Sa.
His subject is quite difference between Kyusyu school sword makers
that the blackish ooitame hada and wild feeling swords.
The blade is bright and fantastic elegant fine Jigane like Awataguchi style.
His students Yasuyoshi, Yukihiro, Yoshisada, Kunihiro Hiroyuki
and Sadayoshi helped his master and studied.
Sa Hiroyuki is a son of the Yukihiro who was working at middle Nanbokucyo period.
From Aoi Art: This blade is Osuriage Mumei. But the wide and magnificent sword.
The Jigane is mixture of Itame and Mokume with Jinie and Chikei.
We can clearly see characteristics of Samonji school.
62nd NBTHK Juyo Paper
Aoi Art estimation paper : whole Oshigata.