Order number : AS17156 (Consignment Sale)
Katana in Shirasaya(NBTHK Tokubetsu Hozon Paper)
Signature : Mumei (Ko-Hoki)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This Mumei (Ko-Hoki) belongs to Jyojyo saku ranking.
The blade was polished.
Blade length : 71.6 cm or 28.18 inches.
Sori : 2.9 cm or 1.14 inches.
Mekugi : 2
Width at the hamachi : 2.90 cm or 1.14 inches.
Width at the Kissaki : 1.50 cm or 0.59 inches.
Kasane : 0.52 cm or 0.20 inches.
Era : Late Heian period to early Kamakura period(around 1180).
Shape : Large Koshi-zori Katana with Ko-Kissaki.
Jitetsu : Oitame Hada and Mokume Hada, Masanagare.
Blacksh Jigane. There are Utsuri.
Hamon : Suguha base with Ko-Midare and Urumi.
In Ha, there are Sunagashi and fine Kinsuji.
Special feature : From ancient era(Late Heian period),
Ho-ki province started making Japanese steal especially Japanese swords
by using high quality iron sand which produced in this country.
It was said to be the founder of the Japanese sword.
The blade is almost Ubu shape. About 840 years passed,
the blade is very precious. There were good quality irons in Izumo province.
The oldest sword smith Ohara Yasutsuna was also from that province.
This blade is typical Ko-Hoki Hamon and work.
NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.