{"id":27515,"date":"2025-07-12T10:25:36","date_gmt":"2025-07-12T01:25:36","guid":{"rendered":"https:\/\/sword-auction.com\/?post_type=product&p=27515"},"modified":"2025-07-13T09:35:40","modified_gmt":"2025-07-13T00:35:40","slug":"as25316-katana-in-shirasaya-with-koshirae-nbthk-tokubetsu-hozon-token-consignment-sale-signature-nagasone-okisato-nyudo-kotetsu","status":"publish","type":"product","link":"https:\/\/sword-auction.com\/en\/product\/27515\/as25316-katana-in-shirasaya-with-koshirae-nbthk-tokubetsu-hozon-token-consignment-sale-signature-nagasone-okisato-nyudo-kotetsu\/","title":{"rendered":"AS25316 Katana: Nagasone Okisato Nyudo Kotetsu(NBTHK Tokubetsu Hozon Token) (Consignment Sale)"},"content":{"rendered":"

Katana in Shirasaya with Koshirae (NBTHK Tokubetsu Hozon Token) (Consignment Sale)<\/p>\n

Signature: Nagasone Okisato Nyudo Kotetsu
\n\u9577\u66fd\u7962\u8208\u91cc\u5165\u9053\u4e55\u5fb9<\/p>\n

Shinto; Saijo O Wazamono; Saijyo Saku; Musashi
\nWe divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku.
\nThis work is ranked as Saijyo Saku for Nagasone Okisato Nyudo Kotetsu.
\nHabaki: Silver foiled single Habaki and gold foiled single Habaki
\nBlade Length: 70.0 cm (27.56 in)
\nCurvature: 1.2 cm (0.47 in)
\nMekugi Hole: 1
\nWidth at Base (Motohaba): 2.94 cm (1.16 in)
\nWidth at Tip (Sakihaba): 2.05 cm (0.81 in)
\nThickness of rim (Kasane): 0.64 cm (0.25 in)
\nSword Weight: 700 g
\nEra: Around Kanbun era, Edo period (circa late 1600s)
\nShape: Slightly wide blade with thick kasane, appropriate curvature, and an extended kissaki forming a well-balanced appearance.
\nJigane: Finely forged with vivid chikei and a relatively clear utsuri. The shinogi-ji and hira-ji are nearly unified. Although most Shinto jigane show masame in the shinogi-ji, here it is itame throughout, forming a remarkable one-piece appearance.
\nHamon: A bright and clear suguha hamon with occasional small ashi. The boshi is curved and rounded with visible kinsuji.<\/p>\n

Features:This is a katana by Nagasone Kotetsu, who is rated as Saijyo Saku and also classified as a Saijyo Oowazamono (supreme sharpness). Nagasone Kotetsu was originally an armor maker from Echizen and is said to have moved to Edo around 1656, at the age of 50, where he transitioned to becoming a swordsmith and adopted the name Sannoj\u014d.<\/p>\n

He initially used the name Okisato, and upon becoming a monk, began inscribing his blades with the characters for \u201cold iron\u201d (Kokutetsu), later changing to \u201cKotetsu,\u201d and from August 1664, he used the characters \u201c\u4e55\u5fb9\u201d for Kotetsu.<\/p>\n

His earliest dated works begin in 1656, and the latest are from 1677.<\/p>\n

The signature of Kotetsu is fine and sharply carved, and this piece shows those characteristics well.
\nKotetsu, a swordsmith loved by many, rarely appears on the market, making this a special opportunity. The seller has now decided to release it, allowing us to present it.<\/p>\n

Koshirae: (Two tsuba included)
\nTsuba 1: Silver base with high-relief carving of wave design, signed “Hakuodo Jujui”
\nTsuba 2: Mokko-shaped shakudo nanako base. The rim is covered with gold.
\nFuchikashira: Silver with high-relief carving of waves, partially detailed in gold
\nSaya: Glossy black lacquer saya with 11 plovers flying on both sides in a charming landscape
\nMenuki: Solid gold with high-relief carving of shishi (lion) motif
\nKojiri: Silver with high-relief wave design
\nKurikata: High-relief carving of wave design<\/p>\n

Aoi Art\u2019s Comment: This is a work by Nagasone Okisato Nyudo Kotetsu, paired with a remarkable koshirae.
\nThe saya, decorated with silver waves and flying plovers, represents a masterpiece-grade mount from the Meiji to Taisho era, when highly skilled craftsmen were still active.
\nOriginally an armorer from Echizen (modern-day Fukui), Kotetsu moved to Edo around age 50 and likely studied under many swordsmiths, becoming a renowned master.
\nAs such, there may be various influences present in his swords. This particular piece shows vivid utsuri and unique jigane where the shinogi-ji and hira-ji share the same itame pattern, differing from most typical works.
\nIt is said that Kond\u014d Isami once owned a Kotetsu or that Kotetsu used an alias, though the truth is unclear. Nonetheless, Kotetsu remains a legendary swordsmith.
\nThe koshirae is an exceptional piece. We highly recommend this outstanding sword and mount.<\/p>\n

NBTHK Tokubetsu Hozon Token
\nAoi Art estimation paper with whole oshigata<\/p>\n

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Katana in Shirasaya with Koshirae (NBTHK Tokubetsu Hozon Token) (Consignment Sale) Signature: Nagasone Okisato Nyudo Kotetsu \u9577\u66fd\u7962\u8208\u91cc\u5165\u9053\u4e55\u5fb9 Shinto; Saijo O Wazamono; Saijyo Saku; Musashi We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku. This work is ranked as Saijyo Saku for Nagasone Okisato Nyudo Kotetsu. Habaki: Silver […]\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-27515","product","type-product","status-publish","hentry","product_cat-katana-en","product_cat-sword-en"],"_links":{"self":[{"href":"https:\/\/sword-auction.com\/en\/wp-json\/wp\/v2\/product\/27515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/sword-auction.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/sword-auction.com\/en\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/sword-auction.com\/en\/wp-json\/wp\/v2\/media?parent=27515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}