Previous answer is
Gassan school
Special feature : It is quite easy to distinguish Ayasugi-hada.
This unique Jigane can’t be seen from other swordsmiths but Gassan school.
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Appraisal Quiz #408 (October 10th, 2016)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged
Blade length : 76.1 cm or 30.0 inches.
Sori : 1.4 cm or 0.55 inches.
Mekugi : 1
Width at the Hamachi : 3.12 cm or 1.23 inches.
Width at the Kissaki : 1.85 cm or 0.73 inches.
Kasane : 0.85 cm or 0.33 inches.
Shape : The blade is very long, standard balance for width and thickness with deep curve and long Kissaki nice looking shape.
Jigane : Masame-hada well grained with Jinie atatch and Chikei work.
Shinogiji : Masame-hada well grained.
Hamon : Niedeki Suguha with thick Nioikuchi Notare and Gunome Midare mixed and also Kuichigai Ha work bright clear Jigane.
In Hamon, Sunagashi and Kinsuji work.
Please discover clues from following.
1 : This swordsmith often made thick Suguha with deep Nioikuchi and Notare style hamon.
2 : Generally the blade is rather wide and thick with small curve and long Kissaki.
3 : He venerated old Samonji school blades.
4 : Please take a look for Yasurime (Kesho) style and Nakagojiri shape.
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