Previous answer is
　　Yasuyoshi
安吉

Special feature: The son of Osa. He is said to have moved from Chikuzen to Choshu.
It is because we can see the same Mei on the Tanto(Juyo Artwork)
that are made with production date of Shohei 17 and Mei of “Choshu Ju Yasuyoshi”,
as his general Yasuyoshi Mei. Works made after that and with Mei “Choshu
Ju Yasuyoshi”, what we could find is made with the production date of Eiwa.
Works with production date of Ouei are controversy, some people say
they are made by later generations, and others say by him.
This work is an early work by Yasuyoshi, and thought to
be made in the late Nambokucho period.

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Appraisal Quiz #699 (July 9th, 2022)
Who made this sword do you think ?
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Blade length: 54.85cm or 21.59inches.
Sori : 1.06cm or 0.41inches.
Mekugi : 1
Width at the hamachi : 3.15cm or 1.24inches.
Width at the Kissaki : 2.77cm or 1.09inches.
Kasane : 0.48cm or 0.18inches.
The weight of the sword 570 grams
Shape : Osuriage. The blade is broad and normally thick with big Kissaki.
Jigane : Itamehada is grained well with active Chikei. It flows with lots of Jinie with Utsuri.
Hamon : Koniedeki like Nioideki. Choji and Ko-Choji with Ko-Gunome. Koashi
and Yo come in a lot. Utsuri appears. Nioikuchi works softly
and Kinsuji/Sunagashi work. Boshi is Midarekomi. Big Kinsuji comes in at the tip.

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