Previous answer is
Special feature : From Heian period to early Kamakura period many swordsmith has been active.
Masatsune, Tomonari, Kanehira, Yoshikane, Sukekane and Tsunemitsu are some of the well known swordsmith at that time.
The traits of Kobizen is that the the blade faces to the Hamon rather than curving towards the tip.
This work has much clear JIgane with mixture of well grained Koitame hada.
Additionally, it is thick and stylish Muku forged work,
The Shinogiji is Koitame hada well grained with mixture of MOkume hada.
The Hamon is combination of KOmidare and Choji. The Yo work is well attached
showing fine Sunagashi, Kinsuji and Boshi work.
Overall, it is natural and old classical style Katana.
Please keep in mind that this sword has passed more than 1,000 year and rare
work. It is a sword that most likely have been passed down in the Daimyo family.
Appraisal Quiz #345 (July 3rd, 2015)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 79.4 cm or 31.25 inches.
Sori : 2.6 cm or 1.02 inches.
Width at the hamachi : 3.21 cm or 1.26 inches.
Width at the Kissaki : 2.16 cm or 0.85 inches.
Kasane : 0.75 cm or 0.29 inches.
Shape : 3.21cm wide and thick blade. Nice shape long Katana.
Jitetsu : Ko-Itame Hada well grained with Jinie attached. The Jigane is beautiful.
Hamon : From Hamachi is Suguha, and then Gunome Midare and Choji Midare.
It looks like Kobushi Choji. In Ha, there are many long Kinsuji and Sunagashi. Boshi is Notare round shape.
Answer will be posted at next Appraisal Quiz.
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