Previous answer is
　 Hizen Kuni Junin Minamoto Muneyasu(previous Mei of Iyonojo Munetsugu 2nd)
肥前国住人源宗安(二代伊予掾宗次前銘)

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 #737 (April 8th, 2023)
Who made this sword do you think ?
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Blade length:42.27cm or 16.64inches.
Sori:1.515cm or 0.59inches.
Mekugi:1
Width at the hamachi:2.89cm or 1.13inches.
Width at the Kissaki:2.2cm or 0.86inches.
Kasane:0.59cm or 0.23inches.
The weight of the sword:440grams
Shape: The blade is broad and thick with shallow Sori and slightly longer Kissaki.
Jigane: Koitamehada is grained well.
Hamon: Niedeki Suguha is grained well with deep and soft Nioikuchi.

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