Katana in Shirasaya(18th NBTHK Juyo Paper)
Signature: Satsuyo shi Motohira
Anei 10 nen Kanotomi 2 gatsu hi (February 1781)
The blade was polished.
Blade length : 76.6 cm or 30.15 inches.
Sori : 1.1 cm or 0.43 inches.
Width at the hamachi : 3.26cm or 1.28 inches.
Width at the Kissaki : 2.24 cm or 0.88 inches.
Kasane : 0.77 cm or 0.30 inches.
Era : Edo period, around Anei era(1781)
Shape : Wide and thick, shallow Sori, gorgeous blade.Shinogi Tsukuri. Iorimune.
Jitetsu : Ko-Itame Hada well grained with Jinie attached. bright Ha.
Hamon : Notare base, Ko-Midare mixed. Deep Nioikuchi, many Sunagashi.
Boshi is small round shape. Nakago is Ubu.
Special feature : Satsuma province produced excellent swordsmiths under the patronage of the Shimazu family. Motohira, born as a son of retaind swordsmith Oku Motonao in 1744 was a representative swordsmith in early Shin-to period. Motohira succeeded the headship of family in 1777 and was appointed Yamato (No) Kami in 1789. His younger brothers Mototake and Motoyasu were also excellent swordsmith and their collaboration still survives. Motohira passed away in 1826, aged 83.
This blade was made in 1781 at the age of 37.
18th NBTHK Juyo Paper
Aoi Art estimation paper : whole Oshigata.