{"id":29220,"date":"2025-11-23T12:28:21","date_gmt":"2025-11-23T03:28:21","guid":{"rendered":"https:\/\/sword-auction.com\/product\/29220\/as25409-%e5%88%80%ef%bc%9a%e4%b8%80%e8%b2%ab%e6%96%89%e7%be%a9%e5%bc%98-%e6%96%87%e4%b9%85%e5%85%83%e5%b9%b4%e5%8d%81%e6%9c%88%ef%bc%88%e7%89%b9%e5%88%a5%e4%bf%9d%e5%ad%98%e5%88%80%e5%89%a3%ef%bc%89\/"},"modified":"2025-11-23T12:28:50","modified_gmt":"2025-11-23T03:28:50","slug":"as25409-%e5%88%80%ef%bc%9a%e4%b8%80%e8%b2%ab%e6%96%89%e7%be%a9%e5%bc%98-%e6%96%87%e4%b9%85%e5%85%83%e5%b9%b4%e5%8d%81%e6%9c%88%ef%bc%88%e7%89%b9%e5%88%a5%e4%bf%9d%e5%ad%98%e5%88%80%e5%89%a3%ef%bc%89","status":"publish","type":"product","link":"https:\/\/sword-auction.com\/en\/product\/29220\/as25409-%e5%88%80%ef%bc%9a%e4%b8%80%e8%b2%ab%e6%96%89%e7%be%a9%e5%bc%98-%e6%96%87%e4%b9%85%e5%85%83%e5%b9%b4%e5%8d%81%e6%9c%88%ef%bc%88%e7%89%b9%e5%88%a5%e4%bf%9d%e5%ad%98%e5%88%80%e5%89%a3%ef%bc%89\/","title":{"rendered":"AS25409 Katana: Ikkan-sai Yoshihiro October, 1861(NBTHK Tokubetsu Hozon Token) (NBTHK Tokubetsu Kicho Token)"},"content":{"rendered":"

Ordering number:AS25409<\/p>\n

Katana in Shirasaya with Koshirae (NBTHK Tokubetsu Hozon Token) (NBTHK Tokubetsu Kicho Token)
\nSignature: Ikkan-sai Yoshihiro
\nOctober, 1861
\nMade upon request of Mr. Sakamoto<\/p>\n

Shinshinto: Jyojyo Saku: Musashi
\n(We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku)
\nThis sword is ranked as Jyojyo Saku among works by Ikkan-sai Yoshihiro.<\/p>\n

Habaki: Gold-plated single-layer habaki
\nBlade Length: 70.2 cm (27.64 in)
\nCurvature: 1.67 cm (0.66 in)
\nMekugi Hole: 1
\nWidth at Base (Motohaba): 3.24 cm (1.28 in)
\nWidth at Yokote (Sakihaba): 2.2 cm (0.87 in)
\nThickness at Rim (Kasane): 0.75 cm (0.30 in)
\nEra: Late Edo period, 1861
\nShape: The blade is wide, slightly thick, with deep curvature, extended kissaki, and remains in very healthy condition with part of the ubu-ha (original blade surface) remaining.
\nJigane: Ko-itame hada, well forged and refined.
\nHamon: Starts with suguha from the hamachi with small ashi, then becomes larger toward the kissaki with active fine kinsuji.
\nThe boshi shows intense activity from the lower part, with prominent kinsuji.<\/p>\n

Features: Works by Ikkan-sai Yoshihiro are rare, and the characteristics of his hamon are clearly visible in this piece.
\nWhile only part of the blade is immediately recognizable, examining the jigane reveals that the hamon is well remembered and characteristic of his style.<\/p>\n

Koshirae:
\nTsuba: Circular iron tsuba with openwork design, inlaid with brass.
\nFuchikashira: Made of suaka (refined copper) and carved with wave motifs.
\nSaya (Scabbard): Black lacquered with brown striped pattern.
\nKojiri: Made of shakudo, designed to lift the blade to prevent inner scratches, with a dragon carved inside.
\nMenuki: Decorated with mantis and plant motifs using iroe (colored gold inlay).<\/p>\n

Aoi Art\u2019s Comment:
\nIkkan-sai Yoshihiro, also known as Nakayama Kurando, often made works resembling that of Etchu no Yoshihiro.
\nSome of these swords were altered to appear older than they actually are.
\nThis is not the fault of the smith himself, but rather due to later modifications by others attempting to make the sword look like a koto (old sword).
\nBecause of its deep curvature and overall appearance, it may have successfully imitated an older style.<\/p>\n

Historical Context:
\nMany of Ikkan-sai Yoshihiro\u2019s works resemble those of Yoshihiro from Etchu and are often referred to as \u201chada-mono\u201d for their fine grain.
\nThis sword comes with a well-made koshirae and is highly recommended.<\/p>\n

NBTHK Tokubetsu Hozon Token
\nNBTHK Tokubetsu Kicho Token
\nAoi Art estimation paper: Whole Oshigata<\/p>\n

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Ordering number:AS25409 Katana in Shirasaya with Koshirae (NBTHK Tokubetsu Hozon Token) (NBTHK Tokubetsu Kicho Token) Signature: Ikkan-sai Yoshihiro October, 1861 Made upon request of Mr. Sakamoto Shinshinto: Jyojyo Saku: Musashi (We divide 4 sections for each sword as Saijyo Saku, Jyojyo Saku, Jyo Saku and Regular Saku) This sword is ranked as Jyojyo Saku among […]\n","protected":false},"featured_media":0,"template":"","meta":[],"class_list":["post-29220","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\/29220","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=29220"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}