Previous answer is
MUMEI (KO-AOE MASATSUNE)

Special feature:The funder of the Kobizen Masatsune was Noritaka
belonged to Saneo school at Hean period moddle to late era.
The signature Masatune both Kobizen and Koaoe were working at the 　　
same age and almost same signature. According to the Fujishiro book,
it is impossible just only the signature and also Jigane, hamon.
This sword is accompanied with the great polisher Miyagata koro reliable 　　
sword judge. According to the paper, this sword is an ancestral sword 　　
of the Daimyo Sanada family in Shinsyu Matsushiro and Sanada 　　
Yukitsura's sword.　　The sword is excellent condition perfect Jigane and 　
marvelous Hamon. The paper(judgement) says that I saw the blade 　　
with respectfully and found the blade is fantastic Jigane
and marvelous Hamon. Miyagata Koro is one of the best sword judge and polisher in Showa period.

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Appraisal Quiz #514 (November 24th, 2018)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length :　　69.4 cm or 27.32 inches.
Sori :1.27 cm or 0.5 inches.
Mekugi : 　1
Width at the hamachi :2.925 cm or 1.15 inches.
Width at the Kissaki :2.14 cm or 0.84 inches.
Kasane : 0.6 cm or 0.23 inches.
Shape : The blade is regular width, thickness
with suitable sori and longer kissaki.
Jigane :Itame hada and ooitame hada well grained
with jinie attach and chikei work
it is visible to see the texture well.
Hamon :Niedeki suguha from the Hamachi area and then active gunome
midare with sunagashi, kinsuji scatter in Ha.
Habuchi is soft feeling and boshi is sansaku style.

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