Blade length: 45.4cm or 8.784nches.
Sori: 1.0cm or0.004inch.
Width at the hamachi: 3,115cm or 1.226inches.
Width at the Sakihaba: 2.16cm or 0.85inches.
Thickness at the hamachi:0.62cm or 0.244inch.
Era: Edo period Kanbun era.
Back ground of era:Kanbun 11 year, Date sodo finished.
( In the Daimyo Date family 's battle.)
Daimyo Date family in the whole house into utter confusion finished.
Shape:The blade is rather thick and wide nice looking shape.
Jitetsu:Itame hada well graind with much Jinie attach blackish strong Jigane.
Also chikei appear.
Hamon: Niedeki Gunome midare hamon like gentle ocean waves.
The Nioikuchi wide and bright Hamon.
Special feature:After 2nd generation Yasutsugu died,from 3rd generation yasutsugu departed 2 families Edo and Echizen families.
This blade is Echizen 3rd generation Yasutsugu typical 1st and 2nd generation style.
But Edo 3rd generation yasutsyugu gradualy accepted Edo style.
NBTHK Hozon paper:Aoi-Art estimation paper:whole Oshigata