Thanks for this information. It is always nice to have some idea of the meanings for the themes of fittings.
For others who have asked about the maker of the kosirae, I contacted the vendor who arranged for it to be made, but they would not reveal the name of the maker. The direct quote from their email was "He is shy and doesn't like to make his name public." I suspect that they don't want me to be able to deal directly with him in the future rather than the maker being shy, but that is what it is. The koshirae was crafted well, and it was done fairly quickly. I had it made along with having the tsuka of another sword rewrapped with new tsuka-ito. The tsuka was was done in about a month's time, and the full koshirae was done in only three. Together with the price of the fittings, the construction of koshirae cost about as much as the blade that it was made for.
The menuki have an NBTHK Hozon paper attributing them to the Denjo school.
The tsuba is mumei shakudo, with a plugged kozuka ana in a plain kenjo style.
The Fuchi Kashira set is signed Yoshikawa Munemitsu (吉川 宗光).
The fittings were purchased as a full set. New seppa had to be made as the craftsperson did not want to try and file the old seppa to fit as the gold foil would be damaged.
The bade that this koshirae was made for is a short katana with new NBTHK Hozon papers that attribute the sword as Mino Senjuin (美濃千手院). The sword also has two older white NBTHK papers. One attributes it to Shitahara and the other to Fujishima. So now I am just a bit confused. I was hoping the newer paper might bring some clarity, but for me it just muddies the waters. The vendor thought that the sword was likely Fujishima. That would make the sword about 100 years older than Mino Senjuin if I have my facts correct. I don't know about. The nakago of the blade is heavily corroded at the mekugi-ana, but otherwise the blade is in beautiful condition aside from a tiny fukure on the shinogi-ji.
Blade length: 63.6cm or 25.0 inches.
Sori :1.9 cm or 0.74 inches.
Width at the hamachi: 3.13cm or 1.23 inches.
Width at the Kissaki: 2.1 cm or 0.8 inches.
Kasane : 0.71 cm or 0.27 inches.
The weight of the sword 660 grams.
All in all, I am pleased with this experience as a learning exercise. I now have an idea of how long things take in Japan. This sword was initially purchased in April of 2021. It was submitted for shinsa in June, it passed shinsa in September, the papers were produced in October, and the koshirae was started in October as well. The sword finally reached my hands as a complete package in January of 2022.