Previous answer is
　 Mumei(unsigned) attributed as Muramasa 　

Special feature: Muramasa was a son of the Nosyu Akasaka Sahei
Kanemura and born at Ise Kuwana province.
The hamon and Jigane is very similar with Heianjyo Nagayoshi.
I think he had a relationship between them.
Generally Muramasa has been reported as most cut well sword
and despises sword from Tokugawa family. grandfather
of Tokugawa ieyasu and his father Hirotada were killed
by usuing Muramasa. heiress of Tokugawa Ieyasu Nobuyasu
was also killed bby Muramasa. So Tokugawa family avoid Muramasa swords.
Many Daimyo who had Muramasa consealed the sword or on the Muramasa
signature remove the whole signature or change the signature
by adding one charactore. In fact, we sometimes find these kind
of Muramasa Tanto. We can see 2 kind of Jigane in Moramasa one is typical
itame hada with jinie attach blackish jigane and onother one is like
this wakizasi. The jigane is very clean with jinie attach
and also strong feeling chikei which is beautiful texture.
This blade is wide and Mitumine style and same Hamon both side
of the blade. From the points, the sword is typical Muramasa.

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Appraisal Quiz #584 ( April 11th, 2020)
Who made this sword do you think ?
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Blade length : 67.1 cm or26.42 inches.
Sori :1.4 cm or 0.55 inches.
Mekugi : 3 (1 Umeru)
Width at the hamachi : 3.28cm or 1.29 inches.
Width at the Kissaki : 2.47 cm or 0.97 inches.
Kasane : 0.73cm or 0.29 inches.
The weight of the sword 740 grams.
Shape : Wide and thick sakihaba is also wide Big　Kissaki gorgeous shape.
On the front, Bo-hi and Soehi are engraved. on the back side, on the back, double Hi are engraved.
Jigane :Koitame hada well grained with jinie attach and long Chikei work.
Hamon :Konie deki choji midare, gunome midare work and then gunome midare choji midare
with ash soft nioikuchi habuchi.　Inside of the Hamon, sunagashi, kinsuji work.
Bo-shi is thick nioikuchi midarekomi with sunagashi kinsuji turns back sharply.

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