PNSSHOGUN

More likely to be the Shin Shinto Yasunori: https://nihontoclub.com/smiths/YAS356

Hi Minh, unfortunately this is very crude work on the Saya and most likely something cooked up recently and unrelated to the Tsuka. Note how the mouth of the Saya has no Kurikata and is uneven? The Tsuba looks to be a modern casting of poor quality. There are vast quantities of assembled items like this being passed off as original Koshirae from Japan, dealers buy this stuff by weight and offload it on ebay. Don't feel too disheartened, many of us bought similar things early on without realising we were swindled. All I can suggest is looking closely at high quality Koshirae, and investing in some good reference books that show what quality original Koshirae should look like.

The mounts are traditional Handachi Koshirae converted for military use by adding a leather cover and hanger to the Saya. There would've been a small leather tab going through the Tsuba to secure it. The sword looks to be Koto Mino.

Nothing worth owning.

For many the lustre of Tokubetsu Hozon was reduced when swords could be submitted and pass Hozon & Tokubetsu Hozon in the same session. There was a extraordinary uptick in swords receiving TH and the significance was watered down to the point of absurdity in many cases. The NBTHK wisely put a stop to this and reverted the sessions to be separate.

If the price is reasonable it would be a fine first sword. Good Kai Gunto mounts and nice looking older blade, many of us started with far less glamorous examples.

Hi Dan, do you know if the estate was that of an Australian soldier?

Kai Gunto with TEC stamp on one Seppa: https://www.samuraishokai.jp/sword/25122.html

Agree with Bryce, Koa Isshin swords are usually in mounts that were produced in Manchuria. The other details of the Koshirae are not consistent with Suya Shoten either.

While certainly a fine and important sword, for such money there is a world of possibilities to choose from. The Tachi Koshirae looks rather modern, and not a superior example.

There's one on a Tsuka for sale here:

Original removable 2nd hanger or Ashi that has seen better days. Still functional for display on an appropriately worn Tye 94 Shin Gunto. Internal diameter: H: 4cm W: 1.9cm $130 USD + shipping

Value is current spot price of scrap metal.

Years ago a similar mounted sword was briefly in my possession. Had figured it was something good due to the special Koshirae, once the Tsuka came off it was a rather mundane Seki stamped Showato. Curiously it also had two Mekugi-Ana.

Looks like it was made yesterday. There are other forums for this sort of thing: https://www.wehrmacht-awards.com/forums/forum/ken-jasper-international-militaria-forums/Japanese-militaria-forum/15293369-ija-field-cap-unissued

Many interesting pieces to admire: https://www.bonhams.com/auction/30802/the-arts-of-the-samurai/?page=3&sortBy=lots_virtual_sort_price_desc

Looks closer to Shin Shinto or Meiji.

Masayuki was active as a smith in Taisho and early Showa, during the period the Type 19 Kyu Gunto was the standard army officers sword. Often you see such threaded Nakago, whether purpose made or altered, on earlier Kyu Gunto or parade swords made during Meiji. If you have further photos of the blade and mounts it would be easier to say for sure.

This was made by the less seldom seen Nidai Yoshichika. There was some claimed provenance to a Lt Colonel who was a member of the Imperial Guards. Overall a handsome sword.

Silk will not melt when burned.

Acetone isn't the best idea for Nihonto, especially one in polish. Sticking with 100% Alcohol is safe.

Cotton buds dipped in pure alcohol should do the trick.

Hi David, if you select your name in the top right corner there is a drop down where you can add and edit ignored users:

It's a clear and poor fake. The only 'good' it possesses is educational value. https://www.jssus.org/nkp/fake_japanese_swords.html

Absolutely heartbreaking to hear of Jeremiah's passing. Hope he's able to find the perfect Masame Hada in the next journey.