Previous answer is
Mumei (Ko Uda)
Special feature: The Uda school is said to have originated in Yamato province.
The founder Kunimitsu moved to Ettyu province in the last Kamakura period.
The texture of jitetsu is a point worthy of appreciation. Especially conspisious chikei appeals us strongly.
Originally this blade was a very long naginata, a kind of halberd
that was one of several similar shapes used attached to a long pole. It is also called a polearm.
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Appraisal Quiz #622 (January 9th 2020)
Who made this sword do you think ?
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Blade length : 68.02 cm or 26.77 inches.
Sori : 1.4cm or 0.55 inches.
Mekugi : 2
Width at the hamachi : 3.1cm or 1.22 inches.
Width at the Kissaki : 2.2cm or 0.86 inches.
Kasane : 0.95cm or 0.37 inches.
The weight of the sword 760 grams.
Shape : This sword has about 3cm of Machiokuri. Wide and thick blade with regular Sori
and longer Kissaki. Good shape sword.
Jigane : Ko-Itame-Hada well grained. Jinie attached beautiful Jigane.
Hamon : Froma Hamachi, Suguha based then deep Nioi-kuchi Gunome-Midare and
Togari-Gunome mixed. Ashi, Sunagashi, Kinsuji worked.
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