説明
Antique Japanese Sword Katana attributed to Sadatsuna with
Tokubetsu Hozon
Certificate
【Description】
This blade is attributed to Sekishu Dewa Sadatsuna (石州出羽貞綱), who was active during the Bunna-Koo era (1352-1390: mid-late Nanbokucho period). The maker’s Sadatsuna lasted three generations and we believe NBTHK’s attribution was given to the first generation. Sekishu is the province located in today’s Shimane prefecture. And Dewa is the name of the village.
Sadatsuna was the son of the first-gen Naotsuna, one of the ten apprentices of Masamune. Masamune is one of the most famous swordsmiths in Japanese history. Those ten apprentices are called Masamune Jittesu (正宗十哲).
The first-gen Naotsuna, his father originally resided in Sagami province (today’s Kanagawa prefecture) to master OSHU DEN tradition from Masamune. Then, Naotsuna moved to Sekishu (Today’s Shimane prefecture). The maker’s name Naotsuna also lasted four generations.
When Sadatsuna was active in the Nanbokucho period, Japan was tumultuous because the imperial court was split into two sides(south and north). There were many conflicts, and many Samurai were deployed. And Sadatsuna must have dedicated himself to forging high-quality blades for those Samurai who fought in battles.
Sekishu is also known as Iwami koku and it was famous for producing the high-quality carbon steel for the Japanese sword. We presume Sadatsuna had easy access to this exceptionally great carbon steel to create his swords.
It is appraised as a
Tokubetsu Hozon Token
(特別保存刀剣) issued by NBTHK(Nihon Bijutsu Touken Hozon Kyokai:日本美術刀剣保存協会). This authentication paper was only given to authentic Japanese swords, especially well preserved and high quality with artistic value.
*Please keep in mind that there are a couple of minor Kitae kizu on Hi (groove on the blade). If you like to know more details, please feel free to contact us.
【 Blade】
Cutting Edge Length(Nagasa)
:
69.7 cm (27.4 inches)
Curvature(Sori)
:
1.8 cm (0.70 inches)
Hamon
:
The crystalline structure which forms along the cutting edge of a blade as a result of the hardening process
Jimon(Jihada)
:
visible steel surface pattern created by folding and hammering during forging process
Nakago
:
Nakago is the tang of the Japanese sword.
Japanese swordsmiths left the black rust on the tang because it prevents red rust while the tang is in its handle. And the discoloration of the tang was created over time, and it is a great indicator for a Japanese sword specialist to estimate when the sword was forged.
Koshirae:
Koshirae is the mounting of the Japanese sword. There are several parts that consist of Koshirae such as Saya(Scabbard), Tsuka(Handle), Tsuba(Handguard).
Fuchi-Kashira
:
A pair of matching sword fittings that cover the upper and bottom parts of its sword hilt.
We assume the theme of Fuchi Kashira is the Kassen Zu (合戦図). You would find the figures of Samurai warriors fighting with swords. So, this Fuchi Kashira depicts the scenery of a waterside battlefield. Since they wear luxurious armor and fight on horseback, we assume they are Samurai of a certain high status.
The Kassen Zu is also seen in the Byoubu (屏風, folding screen) works. According to a theory, Kassen Zu designed folding screens that were made after the beginning of the Edo period. Therefore, many of them did not necessarily depict reality as it was. For that reason, we often find inconsistencies in Kassen Zu Byoubu based on historical research. The Kassen Zu was more concerned with showing authority than historical accuracy, and political intentions were involved.
Tsuka and Menuki
:
Tsuka is the handle of the Japanese sword and Menuki is its decoration.
We estimate it is a combination of Samurai-related tools from what we could see from the gaps of the Tsukamaki thread. For example, we could find a long stick with a strip of cloth. We believe it is a Hatajirushi (旗印, flag). Flags with letters or family crests on Hatajirushis were used on the battlefield to show one’s affiliat