Koto Katana 刀 Mihara 三原 Bingo 備後国 Muromachi 室町時代 with Koshirae

Katana blade:

Traditional Japanese Tamahagane (玉鋼) antique forge work

Cutting edge length: 70,2 cm.
Nagasa: 69,3 cm. 
Sori: 1,4 cm.
Motohaba: 3,0 cm. 
Sakihaba: 2,0 cm.
Motogasane: 0,7 cm. 
Sakigasane: 0,5 cm.
Mei: Mumei 無名

Koshirae:

Tsuka:
Wood: Honoki (Hinoki 檜 Japanese Cypress)
Fuchi/Kashira and Menuki couple: Shakudo with Gold and Silver inlay. Rat and vegetals.
Same: Black genuine Ray Skin
Ito: White natural Silk this white color Ito (like Habaki pure Gold covered) seems to indicate that it is a Koshirae for an important blade and user, in traditionally antiquity white was reserved for persons of at least some importance.
Tsuba:
A great fine forged iron open work with Gold and Silver inlay. Depicted bamboo leaves and stalks in fine intricate work
Habaki 鎺:
Covered for a Solid Gold foil, a traditional Habaki work only for high-level blades
Saya:
Wood: Honoki (Hinoki 檜 Japanese Cypress)
Lacquered: Black traditional Urushi
Sageo: Green Silk
Kojiri: black lacquered with gold edge

Koshirae condition:
It's an antique Koshirae with renewed parts like Ito and Sageo something usual. The general condition is good, showing signs of use and age, but light, as can be seen it through the detailed pictures. 

Koshirae symbolism:
This Koshirae has two symbolisms. Bamboo represents growing in acquiring knowledge and flexibility. the rat good luck, adaptability, resourcefulness, and intelligence.
All this necessary and highly esteemed by the ancient Samurai warriors.

Japanese papers:

Kyoiku-inkai - Japanese official documentation (paper previously called Daimyo) the document card that testifies to the sword ownership :

Sealed of Prefectural (Kyoiku-inkai) Registration Card In order to legally own a original sword in Japan it has to be registered in accordance with the Ju-to-ho 銃刀法.

The Board of Education prefecture issued a registration paper for this sword. In order to obtain this paper, the sword needs to be traditionally hand forged verification. With this paper, its owner can legally own an authentic Japanese sword in Japan.

Daimyo Registered: This sword was registered in current sword registration system started in Japan in modern era. Such swords, which were registered in a few years after the system started, are known among collectors as "Daimyo" (feudal lord) registration swords as it was Daimyo or other Daimyo-like wealthy families who owned many precious swords and were asked by the Japanese government to register their swords in the early stage of the newly introduced registration system to familiarize it to the society but it is not the official name of course what is Kyoiku-inkai (Prefectural Registration Card)

Ref.: Katana 123

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