Previous answer is
Mumei(Den Naoe Shizu)

Special feature: The NBTHK judged this unsigned Katana as Naoe-Shizu 　
as Jyuyo Token. The name of Naoe-shizu is the general term of the pupils of Shizu Saburo Kaneuji who was a one of Masamune 10 tetsu(10 sword makers in Masamuneschool). Shizu the First, Kaneuji was one of the most skillful swordsmiths of the Masamune School. Kanetomo, Kanenobu and Kanetsugu were students of Kaneuji. They moved to Naoe from Shizu in Mino province and forged sword there so they are called Naoe-Shizu. Some of his students gave one's name as Naoe-Shizu. That is, Kaneuji on and after the second generation, Kanetomo, Kanetsugu, Kanenobu and so on are seemed to correspond to Naoe-Shizu.
This sword looks like first generation Shizu saburo Kaneuji from the jigane and hataraki.
The blade was polished by Mukansa polisher recently.

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Appraisal Quiz #449 (July 29th, 2017)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length :　32.3　cm or 12.7 inches.
Sori : 0.4cm or 0.15 inches.
Mekugi : 　1
Width at the hamachi : 2.88cm or 1.13 inches.
Width at the Kissaki : 2.49cm or 0.98 inches.
Kasane : 0.46 cm or 0.18 inches.
Shape : The blade is rather wide and thick
with bo-hi on both sides of the blade.
Jigane :Itame hada and big itame hada mixed
with Jinie attach and chike, utsuri appear.
and visible to see the texture well.
Hamon :Ne deki Gunome midare and choji midare mixed
with Sunagashi, Kinsuji work vividly and Boshi is strong and sharp midarekomi and turns back.

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