Wakizashi in Shirasaya (NBTHK Hozon Paper) (NBTHK Tokubetsu Kicho Paper)

Signature: Chikyu Nyudo Tsunemitsu

The blade was polished.
Habaki : Copper single habaki.
Blade length : 51.9 cm or 20.43 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi: 1
Width at the hamachi : 3.07 cm or 1.20 inches.
Width at the Kissaki : 2.17 cm or 0.85 inches.
Kasane : 0.61 cm or 0.24 inches.
Era : Edo period Keian era.
Shape : The blade is wide and thick with rather deeper sori nice looking shape.
Jitetsu : Koitame hada well grained with jinie attach and Utsuri appear.
Hamon : Koniedeki or Nioideki gunome and Cyoji midare hamon mixed with ash, and Yo scatter and midarekomi boshi.

Special feature : Tsunemitsu was born at Koushu province and moved to Tobu.
He was called Heki Ichinojyo and changed his name Saburo daemon later on.
This sword is mentioned as Chikyu Nyudo which is unusual name.
Probably the signature is his later age which got after the title of Ippo(Kazunori).
Tsunemitsu is old brother of Mitsuhira who is also skillful to make Ichimonji style.
Both of them are making Ichimonji style Kamakura period and after the studying they succeeded.
This sword is healthy and nice Ichimonji Bizen school.

Historical background:
1651 Meian 4th year : Keian no Hen (Yui Shosetsu no Ran) high treason.
At that time, a lot of Ronin (masterless samurai) had disaffectedness against Shogun.
Yui Syosetsu who was well known army scholar leaded them to subverted Tokugawa Shogun but failed and tried seppuku by himself (cut body).
After that Shogun tried to abate their anger, ordered to hire many Ronin at the clans.
The shogun changed the helm to peaceful country by using Law and knowledge not strength.

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