Previous answer is
　 Ou Tokutomi Shi Ju Ikkansai Okimasa Saku/Showa 18 Nen 6 Gatsu Kichijistu

Special feature:Tsukamoto Ikkansai Okimasa was born at Fukushima prefecture
in Koriyama city and moved to Tokyo and worked under the
Tsukamoto Ikkansai Shigetsugu. He performed estimated work and
got married with master's daughter and received master's name
Ikkansai. He passed away Syowa 33 age 43 year's of age.
He got a lot of prizes during war time and also after the war.
He was ordered as sword craftman and got navy Minister prize, the
ministry of education prize, and also after the war end, he got Yusyu
prizes 3times, Yusyusyo prizes and got many prizes.

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Appraisal Quiz #663 (October 23rd, 2021)
Who made this sword do you think ?
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Blade length:46.4cm or 18.26inches.
Sori:1.7cm or 0.66inches.
Mekugi:1
Width at the hamachi:3.1cm or 1.22inches.
Width at the Kissaki:2.35cm or 0.92inches.
Kasane:0.6cm or 0.23inches.
The weight of the sword: 440 grams.
Shape:The blade is wide and thick, has deep Sori with long Kissaki.
Jigane:Koitame-hada very close grained with Jinie attached
Hamon:Suguha with deep Nioikuchi, after that Notare and Gunome, Sunagashi and
Kinsuji work in Hachu, Boshi is Komaru which ends with deep Nioikuchi by Yakisage.

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