I cant see enough of the sword to help much in identification but here is some info I got from some? old military books.
There are four basic types of Japanese swords:two of them short,under 24 inches,and two are long,over 24 inches in blade length.The Samurai always carried a pair of sheathed swords - one long,one short.
when clad in armor? or in formal dress, the Samurai wore the long sword called a TACHI. The matching short sword was called a TANTO.
In ordinary dress ,they wore the KATANA, often three feet in length, thrust through the girdle, edge upward.
Many swords are decorated with engraving or inlay work on the blade, although the major decoration was reserved for the TSUBA,or guard; the FUCHI, a collar encircling the hilt at the guard end; and the KISHIRA or pommel-cap. These were often embellished with high relief carving ,engraving, etching, piercing, inlay work, incrustation with precious metal or a combination of all. The scabbard or SAYA was finished with laquer and had decorated fittings.
Finishing of the sword hilt,TSUKA,begins with covering of the pebbled skin of a ray fish.Then flat silk braid is wrapped overthe hilt in a pattern that leaves a row of lozenge shaoped openings on either side,exposing the white ray skin.
Identification of the swords, require the removal of the TSUKA, which may be accomplished by carefully forcing out the single tapered wooden peg, MEKUGI, which fastens it to the tang. The TSUKA, may then be slid off revealing the makers name,his titles and the place where the sword was made. The date is usually found on the other side of the tang. Certain patterns of the files mark, will also aide experts on th authentification and dating.