Previous answer is
　 Yokoyama Kozuke Daijo Fujiwara Sukesada
横山上野大掾藤原祐定
Bishu Ju Osafune Junin
備州長船住人

Special feature: Hizen Kuni Junin Minamoto Muneyasu is the previous signature of Iyonojo Munetsugu 2nd. It has extremeness of Soshuden so it apparently looks like old works.

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Appraisal Quiz #739 (April 22nd, 2023)
Who made this sword do you think ?
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Blade length: 54.55　cm or 21.47 inches.
Sori: 1.212 cm or 0.47 inches.
Mekugi: 2
Width at the hamachi : 2.62 cm or 1.03 inches.
Width at the Kissaki : 1.97 cm or 0.77 inches.
Kasane : 0.55 cm or 0.21 inches.
Shape : Thick and regular width Wakizashi with shallow Sori.
There are Bo-Hi on the both side of the blade.
Jitetsu : Itame Hada and Mokume Hada mixed with Jinie attach.
There are Chikei and Bo-Utsuri.
Hamon : Nie Deki, Suguha base Hamon with Gunome Midare and Ko Choji Midare. There are Ko Ashi, Sakasa Ashi, Yo, Kinsuji, and Sunagashi. The front Boshi is Midarekomi style and rounded at the tip. The back Boshi is shallowly Notare style and pointed at the tip.

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