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  3. Kohoki(Katana)古伯耆

(Katana)
Mumei Kohoki
太刀 無銘 古伯耆

Item NO.No,K00235PriceReference item
PaperNBTHK Tokubetsu Hozon token Paper
CountryHouki
PeriodLate Heian period（平安時代後期）,12th century
Blade Length69.8cm|27 31/64in
Curve(Sori)2.1cm|53/64in
Top Width
(Sakihaba)		1.8cm|45/64in
Bottom Width
(Motohaba)		2.7cm|1 1/16in
Bottom Thickness
(Motokasane)		0.6cm|15/64in
Top Thickness
(Sakikasane)		0.5cm|13/64in
KeijoShinogizukuri, iorimune, sori yaya tsuki,chū kissaki.
KitaeŌita-me ni moku-majiri, hada-me ga tachi, ka na iro kuro mi o obite,chi nie atsuku yoku tsuku
HamonSugu-chō ni asaku no tarete,-shō no tare gu no me majiri, ko ashi-iri, kin suji-iri, suna nagashi kakari, nie yoku tsuku
BoushiSugu komaru ni kaeru.
HoriBohi o kakinagasu.
NakagoUbu,Saki-Kurijiri,Yasuri-Unclear
AccessoriesShirasaya（Tanobe sign）,Copper　ichijuhabaki
DetailsKo Hoki is a general term for Yasutsuna and his clan of swordsmen including Mamori, Aritsuna, Sadatsuna, and Masakiage. Among them, Yasutsuna's sword is the most famous, being counted as one of the Five Great Swords of Japan as "Doujigiri Yasutsuna." The name "Doujigiri" comes from the legend that Minamoto no Yorimitsu, the heir to the Seiwa Genji clan, used this sword to cut off the head of Shuten-doji, a demon who lived in Oeyama, Tanba Province. In 1719 (the 4th year of the Kyoho era), the 8th Shogun of the Edo Shogunate, Tokugawa Yoshimune, ordered Hon'ami Mitsutada to create this sword, and it is also listed as "Meibutsu Doujigiri." This sword is a heavily polished sword with no signature, and is considered to be an ancient Hoki sword. The forging process has a mixture of large-scaled hardened blades, pronounced grain, and a dark hue mixed with ground patterns. The blade has pronounced blade surface, good ka-mon (blade pattern), sand-flowing pattern, and abundant gold lines, making it a masterpiece that displays the characteristics of ancient Hoki.
古伯耆とは安綱をはじめ、その一門の真守・有綱・定綱・真景らの汎称である。その中でも安綱の刀は「童子切安綱」として天下五剣の一つとして数えられ、最も有名である。「童子切」の名は、清和源氏の嫡流である源頼光が丹波国大江山に住み着いた鬼・酒呑童子の首をこの刀で切り落としたというこの伝説に由来し、享保4年（1719年）に江戸幕府第8代将軍徳川吉宗が本阿弥光忠に命じて作成させた、『享保名物帳』にも「名物 童子切」として記載されている。本刀は大磨上無銘の刀で、古伯耆と鑑せられるものであり、鍛えは大肌が交じって、肌目が立ち、地景を交えて黒味がかり、刃文は刃肌が立って、よく沸づき、刃中には砂流し、金筋が盛んに入るなど古伯耆の特色が窺える名品である。
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