PNSSHOGUN

He can be contacted on Facebook.

The only vaguely standardised Kyu Gunto would be the arsenal blades, though even those had variations between makers and could be customised for length.

Really nice examples there, thank you for sharing.

The seller appears to have a vast amount of spare fittings and bare blades listed, wouldn't hold high hopes of anything being correct.

Are the mounts Navy, Army, or traditional?

Agree with Ian, this is clearly a WWII period made blade. The significant rust (likely from being submerged in water) gives a much older appearance.

Perhaps Owari Seki. Ideally photos of the full Sugata without Koshirae and clear shots of the Boshi on a neutral background would help.

That's a really great find and writeup, thank you for sharing. It isn't unknown for a general officer to still retain his field grade sword, Lt. Gen Baba's sword in the Australian War Memorial is a field grade cavalry Kyu Gunto with Shin Gunto general officers knot. From memory the black knot was authorised for use by all ranks in the field, the sword may have also been used by one of his sons? Did you have any details on how the sword came to the USA?

Dreadful fake:

Was this sword in military mountings? I understand quite a number of Japanese families emigrated to Brazil, it always amazes me where these swords show up.

Two examples in my collection. There may be a relationship between Gosan no Kiri and officers in the Imperial Guard divisions.

Nice collection, now the hard part is a general grade knot or tassel! You could use a generic black field knot too, there are plenty of photos showing General officers using those in the field.

The cross hatch filing pattern on the Nakago are textbook Mino Den.

Hi Thomas, glad you ended up with that sword. Could you please spare us some photos of the whole sword and mounts, this looks like a really good find.

A dreadful fake Yasutoku purporting to be made for Yamashita: https://auctions.yahoo.co.jp/jp/auction/m1223043675