Katana in Koshirae (NBTHK Hozon Paper)

Signature : 1 Hizen Koku Dewa no kami Yukihiro
Motte Oranda kitae saku

The blade was polished.
Blade length : 69.69 cm or 27.43 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi : Ubu 1
Width at the hamachi : 3.06 cm or 1.2 inches.
Width at the Kissaki : 2.22 cm or 0.86 inches.
Kasane : 0.68 cm or 0.26 inches.
Shinto : Hizen : Jyosaku
Era : Edo period. Kanbun era.
Shape : The blade is wide and thick raher heavy healthy blade with deep sori and long kisaki.
Jitetsu : Koitame hada well grained with jinie attach and also typical Hizen Konuka hada.
Hamon : Niedeki Gunome Midare Hamon mixed Oo(Big) Gunome and deep Nioikuchi. In Ha, there are many sunagashi and kinsuji work.
Boshi is round shaped Notare style.

Special feature : Yukihiro was a swordsmith of Hizen province.
He was the Second son of Hashimoto Yoshinobu.
Yukihiro got the title of Dewa Daijo in 1648 and ranked up to Dewa no Kami in 1663.
He made swords his characteristic way by using Holland steel which is called Oranda tetsu.
He passed away in 1683, aged 66 (RIP).
This blade's detail is similar as same as Masahiro's blades, Brilliant hamon (deep nioikuchi, gunome Midare and In ha, there are many sunagashi and kinsuji work) reminds us of a cumulonimbus cloud in summer.
Almost his sword are quiet works but this blade is really active blade and also great work, its very really rare.
He used Holland iron for making his swords, the steels is very expensive at that time.
We find many swords which are used by Holland steal during early to middle Edo period.
We don' know why other swordsmith did not use Holland steal after Kanbun era at edo period.
Anyway this blade is one of his masterpieces.

Koshirae :
Tsuba : On the oval shaped iron Tsuba, the characters and cloud are engraved.
Fuchikashira : Kojiri : On the iron plate, the arabesque design is engraved.
Menuki :

NBTHK Hozon Paper.
Aoi Art estimation paper : whole Oshigata.