AS21790-Katana: Mumei (Ko-Uda)

Katana in Shirasaya with Koshirae(NBTHK Tokubetsui Hozon Token)
Signature :　Mumei Ko-Uda
無銘(古宇多)　

(We divide 4 sections for each sword as Saijyo saku, Jyo-jyo saku, Jyo saku, and regular saku)
This sword belongs to Jyojyo saku ranking.
The blade was polished.
Habaki:　Gold foiled double habaki.
Blade length:66.2cm or 26.06inches.
Sori:1.1cm or 0.43inches.
Mekugi:3
Width at the hamachi:2.91cm or 1.14inches.
Width at the Kissaki:2.02cm or0.79 inches.
Kasane:0.65 cm or 0.25inches.
The weight of the sword:635grams.
Era: From the late Kamakura period to the early Nambokucho period
Shape: Osugirage Mumei. The blade is broad and thick. There are Boho on the both sides. Boshi is slightly long.
Jigane: Itamehada is grained well with Unsure.
Hamon: Niedeki, Suguha Hamon with lots of Koashi and Kinsui. Boshi is round and becomes Hakikake sharply.

Special Feature: Kouda works often have Itamehada Jigane, Suguha Hamon with lots of works, and Hakikake Boshi.

Koshirae:
Saya: Brown Saya with patterns, very elaborately-made.
Tsuba: Iron Tuba with leaf patterns by openwork.
Fuchikashira: On iron plate, patterns are engraved with brass.
Menuki: Chicken patterns are engraved.
Kojiri and Kashiwade: Darkbrown-painted Shakudo is painted by gold.

From Aoi Art: This Mumei was judged as Kouda, which has works like Norishige works. Koshirae is also nice and in healthy condition. Typical possession of the high-classed Bushi. We truly recommend this one for you.

NBTHK Tokubetsu Hozon Token
Aoi Art estimation paper: whole Oshigata by