Habaki : single copper.
Blade length : 65.6 cm or 25.82 inches.
Sori : 1.5 cm or 0.59 inches.
Mekugi : 1
Width at the hamachi : 3.25 cm or 1.27 inches.
Width at the Kissaki : 2.02 cm or 0.79 inches.
Kasane : 0.72 cm or 0.28 inches.
Era : War period.
Shape : It is wide and thick with some sori.
Jitetsu : Jitetsu :It is Muji style Jitetsu..
Hamon : NIe Deki Gunome Midare work.
Special feature : During wartime, many sword smiths have made Nihonto for the army and navy.
He has made untempered katana.
Ishihara Kanenao is most likely a sword smith producing swords in Seki Province.
There are some rusts. Probably, father presented his son this Katana
that is family treasure while World War 2.
And this Army Koshirae was made then.
Koshirae : Army Gunto Koshirae.
Saya and Tsuka covered with leather case.
