Ordering number : 19260
Katana in Shirasaya(NBTHK Tokubetsu Hozon Paper)
Signature : Mutsu Ju Koyama Munetoshi
Genji gannen 8 gatsu hi (August 1864)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyo Jyo Saku ranking.
The blade was polished.
Habaki : Gold foiled double Habaki.
Blade length : 72.1 cm or 28.38 inches.
Sori : 1.2 cm or 0.47 inches.
Mekugi : 1
Width at the hamachi : 3.11 cm or 1.22 inches.
Width at the Kissaki : 2.26 cm or 0.88 inches.
Kasane : 0.835 cm or 0.32 inches.
Era : Late Edo period. around 1864.
Shape : Regular width and thickness Katana with relatively large Sori.
The Kissaki and Nakago are long.
Jigane : Ko-Itame Hada well grained with Jinie attach.
The Jigane is beautiful.
Hamon : Nie Deki, Choji Midare with thick Nioikuchi and Ashi.
Boshi is Togari Gokoro.
Special feature: Koyama Munetoshi and Koyama Munetsugu are different by one character.
The reason why Munetsugu regards him as good sword smith.
The facts, his work is mostly the same as his master.
The blade has woundeful Gunome Midare with Nioikuchi.
It might be able to call his blade is better than Mumetsugu.
After 4 years, Meiji period commenced. In 1876 the Haitorei(decrees abolishing the wearing of swords in public) was issued.
He had to give up making the sword. It was mortifying.
The Nakago shape is also looks like his master’s one.
He made the sword with him all soul. The blade is very healthy.
The blade has Ububa.
Histrical background:In 1863 and 1864, The Shimonoseki Campaign.
NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.