Photographs
Photographs by the seller at origin.
The piece
Katana by Ishidō Unju Korekazu, seventh master of the Ishidō, dated 1858 and designated Jūyō Tōken by the NBTHK at its 23rd session; in shirasaya with sayagaki.
Katana forged by Ishidō Unju Korekazu, seventh master of the Ishidō house in Edo, known for blades in the Bizen and Sōshū traditions. Shinogi-zukuri blade with iori-mune, a nagasa of 75.8 cm according to the paper, 1.3 cm of sori and a chū-kissaki, with bōhi on both sides. According to the paper and the original seller, the jigane is a tight ko-itame with jinie, and the hamon is a nie-based chōji and gunome midare with sunagashi and kinsuji; the bōshi is straight with a ko-maru. The tang is ubu, with one mekugi-ana, and bears a commission signature: 為大塚一信君 石堂運寿是一精鍛作之 (Ōtsuka Kazunobu-kun no tame Ishidō Unju Korekazu seitan kore o saku); on the ura, 安政五年戊午二月日 (Ansei go-nen tsuchinoe-uma nigatsu hi). Designated Jūyō Tōken at the 23rd NBTHK session on 1 July 1975; the photographs show the certificate and the zufu page. It is kept in shirasaya with a 1975 sayagaki by Satō Kanzan. No koshirae is included.
Strong points
- NBTHK Jūyō Tōken (23rd session, 1975)
- Commission signature and full date: Ansei 5 (1858)
- Ubu tang with a single mekugi-ana
- Shirasaya with sayagaki by Satō Kanzan
Points to bear in mind
- Offered in shirasaya only, without koshirae.
- The listing says nothing about the blade's condition or polish.
Score
176.4 pointscurrent max. 255
-
Certificate
+140
NBTHK Jūyō paper +140
-
Tang
+25
Tang intact according to the seller at origin +25
-
Declared condition
−20
The original seller says nothing about the condition −20
-
Signature and date
+25
Signed and with an engraved date +25
-
Mounting
−15
No mounting −15
-
Blade
+15
75.8 cm: long blade, 74 cm or more +15
-
Shirasaya
+5
With a storage shirasaya +5
-
Price
+1.4
Price: the more affordable, the more points +1.4
The score adds and subtracts points for each feature of the piece and has no ceiling: the highest in the catalogue today is 255. It is computed from the record, not from an opinion. The mounting starts from what is known of its period, adds what vouches for it (its own NBTHK paper, a signed fitting, a crest) and subtracts what has been restored (saya, ito, same, habaki or sageo).
Measurements
- Nagasa
- 75.8 cm
- Sori
- 1.3 cm
- Tang
- Intact (ubu)
- Certificate
- NBTHK Jūyō
- Mounting
- No mounting
- Storage shirasaya
- Yes
- Smith
- Ishidō Korekazu
- Period
- Shinshintō (1781-1876)
- Dating
- 2nd month of Ansei 5 (1858)
- Mekugi-ana
- 1
- Condition
- Condition not declared
- Signed
- Yes
- With an engraved date
- Yes
- Motohaba
- 2,91 cm
- Sakihaba
- 2,07 cm
- Motokasane
- 0,88 cm