説明
Antique Japanese Sword Katana attributed to Sadatsuna with NBTHK
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.
This blade is appraised as a
Hozon Touken
(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, well preserved and high quality with artistic value.
【Blade】
Cutting Edge Length (Nagasa)
:
64.5 cm ( 25.4 inches)
Curvature (Sori)
:
1.5
cm (0.59 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.
The motifs of this Fuchi Kashiras are Hannya-no Men/Hannya (般若面/般若). It is a kind of Noh (能, a form of Japanese drama performed in masks and costumes) and is a mask of a vengeful spirit that expresses a woman’s jealousy and resentment. Therefore, a Hannya is a mask of a Kijo (鬼女, a monster that turned a human woman into a demon, a female demon). There are two long horns painted with gold on its forehead. On the top of the head, like other female masks such as Ko-Omote (小面), the hair is drawn on the left and right, but in the case of Hannya, the hair is disheveled to express a ferocious look. Artificial eyebrows (eyebrows drawn with eyebrow ink above the original eyebrows) are drawn on the forehead. The eyes beneath the furrowed eyebrows are golden, with a hole only for the pupil. The mouth opens wide, revealing upper and lower teeth fitted with metal fittings and two pairs of fangs. The characteristic feature of the Hannya mask is that the upper half has a sad expression with frowning eyebrows, while the lower half has a wide-open mouth expressing fierce anger. This kind of design is said to represent the dual nature of the demon woman’s heart, which is filled with anger and sadness.
Tsuka and Menuki
:
Tsuka is the handle of the Japanese sword and Menuki is its decoration.
The theme of this Menuki’s design is the Takaradukushi Zu (宝尽くし図). It is