説明

Antique Japanese Sword Katana Unsigned Ko-Uda with NBTHK Tokubetsu Hozon Certificate 【Description】 This blade is attributed to the work of Uda school by NBTHK, which authenticated this blade. While the certificate doesn’t mention when it was forged, NBTHK appraises it was made in the Kamakura-Nanbokucho period (Approx. 1299 – 1393). We made a phone call to NBTHK to confirm it. Uda is a prestigious school that flourished during the Nanbokuchoto-mid Muromachi period(approx. 1334-1491). It was founded by Kunimitsu(国光) in the late Kamakura period. The school was located in Etchu province in Toyama prefecture today. Kunimitsu was originally from Yamato Uda Gun(大和宇多郡), located in Nara prefecture but moved to Etchu in the late Kamakura period(1299-1333) with his apprentices including Kunifusa(国房), and Kunimune(国宗). Uda school was famous for producing practically designed blades, which were desirable during Nanbokucho- Muromachi period. Among other schools in the Hokuriku region(the northwestern part of Honshu), Uda school was the most prominent school. When the Uda school flourished in the Nanbokucho period, Japan had a tumultuous time because the imperial court was split into two sides(south and north). There were so many conflicts, and many Samurai were deployed. The trend in battlefields was to use a surprisingly long sword. This trend continued until the early-mid Muromachi period. This blade doesn’t look long now, but we assume it used to be quite a long sword based on the tang’s shape, meaning it was shortened a few times in the past. There are two categories in the work of Uda school. One is called Ko Uda(Old Uda), and the other is called Uda. Ko Uda swords were forged during the late Kamakura period to the Nanbokucho period. Uda blades were forged during the Muromachi period. This blade is categorized as a Ko-Uda blade. This blade is appraised as Tokubetsu Hozon certificate issued by NBTHK. This authentication paper was only given to Japanese swords, especially worth preserving by Nihon Bijutsu Touken Hozon Kyokai(the Society for the Preservation of the Japan Art Sword). It has beautiful Suguha tempering line with vivid Jihada. It accompanies with gorgeous sword mountings. 【 Blade】 Cutting Edge Length(Nagasa) : 68.2 cm( 26.85 inches) Curvature(Sori) : 2.0 cm( 0.79 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(Sabbard), Tsuka( Handle), Tsuba(Handguard). Fuchi-Kashira : A pair of matching sword fittings that cover the upper and bottom parts of its sword hilt. Ume (梅, Japanese apricot blossom) decorates this Fuchi Kashira. Furthermore, Matsuba-Mon (松葉文, pine needles pattern) is also designed. These plants are inlaid with silvery metal. Japanese apricot blossoms bloom in winter that snow covers its tree. So that people thought this flower tells the arrival of spring. Japanese people appreciate this flower for a long time. People enjoy its adorable petal shape and scent, gracefully branched tree, and compose many poems. As it comes out in the cold season, it symbolizes the power of perseverance and vitality. About Matsuba-Mon, even if the pine needles fall, the roots of the two leaves are firmly connected and do not separate. Therefore, this plant motif has been treated as a lucky charm. Due to this idea, it also represents happy marriage. There was a famous Shogun who cherished this design. Tokugawa Tsunayoshi, the 5t

Antique Japanese Sword Katana Unsigned Ko-Uda NBTHK Tokubetsu Hozon Certificate
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Antique Japanese Sword Katana Unsigned Ko-Uda NBTHK Tokubetsu Hozon Certificate

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仕様

長さ

68.2 cm

反り

2 cm

流派について

Ko-Uda School古宇多派

51 重要刀剣

古宇多は越中宇多派の最も早い相をさす称であり、その出自は北国にあらずして大和にある。説明書はその祖を僧体の刀工古入道国光と伝え、大和国宇陀郡より北上して鎌倉時代末期の文保頃に越中宇津の地に来住し、大和譲りの鍛刀を北国にもたらして一派を興したとする。国光には確かな在銘作が殆ど遺らず、その名は最も古い作を強い大和気質によって極める要として立つ。その子に国房・国宗があり、国次らと共に南北朝期へ系を継ぎ、同銘を代々相承して室町期に及んだ。古宇多とはこのうち鎌倉末期より南北朝の作をいい、国房はそのなかでも在銘作を遺す数少ない一人として、康応元年に上る年紀を伝える。後の友則のごとき工に至るまで、一派は個々の名よりも時代と一派とに拠って鑑せられ、極めの多くは個名ではなく古宇多の名に帰する。 作風は一派が遂に融合させなかった二様にわたる。一は終始失われぬ大和の本性で、短刀・脇指に最もよく現れる。流れごころに肌立った板目あるいはつんだ小板目に杢を交え、中直刃を基調に小互の目・浅いのたれを交え、刃縁には喰違刃・細かなほつれ・打のけが交じり、足入り、匂深く小沸つき、砂流し・金筋がかかり、帽子は直ぐに小丸あるいは焼詰めに掃きかける。今一つは相州伝がかった手で、説明書はこれを越中則重に学び江を範としたことに由来させ、南北朝の豪壮な太刀に現れる。身幅広く重ね厚く、流れごころの板目に地景・地沸つき、のたれや直刃に互の目を交えて沸よくつき、砂流し頻りに金筋入り、帽子は乱れ込みに掃きかける。両様の底に変わらぬのは地鉄であり、板目はかな色黒みをおびて処々カス立ち潤み、鍛えがつまれば白け映りが鮮やかに立つ。説明書はこの色を北国物特有の持味と呼び、刃縁につくつぶらな沸を宇多派の徴とする。後代宇多との別は、この黒く肌立つ地と沈みごころの匂口にあり、明るく冴えた真の相州物からも、より素朴な北国の工からも、これによって分かたれる。 鑑定の勘所はこの地鉄に始まり地鉄に終わる。最も相州然とした沸の豊かな作をも北国へ戻すのは黒く肌立った地と沈む匂口であり、説明書は相似が造込みに止まり純然たる相州伝の極めには至らぬことを明言する。古宇多に細かく明るく地景の細やかなものと、肌立って地景大きく黒味のものとの二様があり、説明書は前者を義弘、後者を則重の流れに分かつ。主要工としては、祖たる国光が大和気質と北国の地とを併せて一派の基を据え、国房は鍛えのつまった地鉄を固有の見どころとして相州伝を宇多の作風に引き入れ、国宗はやや肌立った地によってこれと対をなす。これに国次・友則らが続くが、説明書は友則を一派中でも技術の高い工と序しつつ棟梁とはせず、他は総じて古宇多の名に括る。在銘作が稀であるため、現存の多くは大磨上無銘の極めであり、その指定はおおむね重要刀剣の階にあって、国宝も重要文化財も伝わらず、大名の所伝も乏しい。来歴の知られる例は黒川古文化研究所や旧蔵家を経た数口にとどまる。されば古宇多の鑑賞は名物の連なりによるのではなく、作そのものと、大和の鍛刀がいかに北国に根づいたかを語る地鉄に拠る。年紀の上がる在銘の一口が世に出ることは稀であり、その作はこの二つの伝統が北国で出会った様を実際に見られる場所である。

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