Previous answer is
Awataguchi Ikkanshi Tadatsuna Hori dosaku
Genroku 13 Nen Koutatsu 8 Gatsuhi Kichijitsu(August 1700)
Special feature : 2nd generation Tadatsuna is a son of the first generation Tadatsuna.
He succeeded first generation and named Ikkanshi Tadatsuna.
First atage his subject is as sama as first generation Tadatsuna like Ashinaga Cyoji midare with sunagashi a lot.
But At genroku era, he made very active Gunome midare and wavy doranba hamon.
Sometimes he engraved dragon on the Ji and high reputation from rich high ranked Marchant and Daimyo.
His Horimono is said that the highest reputation at Edo period.
So even right now many sword collectors hope to buy this Ikkanshi Tadatsuna hori dosaku(sword and engraving both Tadatsuna)
His Horimono is special feature that the eye brush and deep horimono.
This sword is marvelous wonderful Horimono and Jigane and also wavy do-ranba hamon.
The blade is quite healthy and we can say that the blade is one of the top ranking his sword.
We recommend this sword for you.
background of age: 1700 July.
1701 Feb At Edo castle Matsu no rouka, Akaho domein Lord Asano Naganori tried to kill Kira kouzuke nosuke but failed.
1702 December 47Ronin of Akaho Daimyo attacked Kira hause and killed him but next year, These ronin and Ooishi Yoshio were Seppuku.
Appraisal Quiz #366 (December 11th, 2015)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 71.0 cm or 27.95 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi : 3
Width at the hamachi : 3.14 cm or 1.23 inches.
Width at the Kissaki : 2.16 cm or 0.85 inches.
Kasane : 0.65 cm or 0.25 inches.
Shape : Rather Suriage, Machiokuri Katana. Wide and thick blade with deep Sori. The nice shape Katana. The Shinogi is wide.
Jitetsu : Itame Hada well grained with Jinie attach. There are many Chikei along by the Itame. Masanagare. The Jigane is quite nice.
Hamon : Nie Deki, deep Nioikuchi. There are double-Ha and Uchinoke.
In Ha, there are Sunagashi and Kinsuji. The Ha is soft and bright.
Answer will be posted at next Appraisal Quiz.