Previous answer is
Chounsai Emura saku/Haishou 12 gatsu 8nichi

Special feature : Chounsai Emura is the head of the Okayama warden.
The maker of the sword will collect the convict who is in serious behavior and made them make swords in the prison next to the head warden.
The polishing was also done in the sword factory.
Before, Nagamitsu and Emura has been easily confused but Emura has been passed away at Showa 35th year.
The condition is different from those of Nagamitsu and the condition is strikingly good.
I have been looking in to Emura and Nagamitsu for a long time and I can say that while Nagamitsu has made many sword of different qualities, Emura has made all sword above the standard.
Some swords may even be better than the Yasukuni sword.
Tempering and and engraved signature was done by Emura.
There were signature such as 江-E-, 江村Emura-、長運斉江村作Chounsai Emura saku.
It is a master piece of Kanemitsu.

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Appraisal Quiz #288 (April 25th, 2014)
Who made this sword do you think ?
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Hints. ※The picture will be enlarged

Blade length : 44.8 cm or 17.63 inches.
Sori : 1.6 cm or 0.62 inches.
Mekugi: 2
Width at the hamachi : 3.28 cm or 1.29 inches.
Kasane : 1.82 cm or 0.71 inches.
Shape : Wide and thick blade. Mitsumune Naginata.
Jitetsu : Itame hada. There are Jinie and Chikei attached.
Hamon : Suguha and Gunome Midare mix. There are doubule Ha and deep Nioikuchi.
In Ha, there are Kinsuji and Sunagashi. Boshi is Komaru Hakikake and round shape.

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