Do you own an authentic Japanese Koshirae that you are considering selling?
Supein Nihonto buys antique Japanese sword mountings directly from private collectors, families, estates and dealers worldwide.
We are interested in complete Koshirae, partial mountings, mounted swords, fittings preserved together as a set, certified examples and complete collections.
If you are unsure about the period, school, originality or value of your koshirae, send us clear photographs and we can assess it.
Some Koshirae contain fittings that were deliberately created as a coordinated group.
These may share:
The same subject
Maker
School
Materials
Decorative techniques
Patination
Artistic style
A coordinated set can have greater historical and collector interest than fittings assembled from unrelated pieces.
If the fittings appear to match, please keep them together.
What photographs should i send?
Please send:
Full view of the complete Koshirae,
both sides,
tsuka,
tsuba,
fuchi,
kashira,
menuki,
saya,
kojiri,
kurigata,
koiguchi,
kozuka or kogai, if present,
any signatures or inscriptions,
blade, if present
shirasaya, if present
storage box,
NBTHK or NTHK papers,
provenance documentation.
Detailed photographs are especially useful when several fittings are present.
Japanese sword mountings were sometimes modified, remounted or assembled from components of different periods.
Later restorations and replacement fittings also exist.
Send us clear photographs of the complete mounting and its individual components.
We can determine whether the piece is relevant to our area of specialisation.
Sell your Koshirae
If you own an antique Japanese Koshirae, a mounted sword, a partial mounting or a complete collection that you are considering selling, send us photographs for an initial specialist assessment.
Complete mountings, partial koshirae, inherited pieces and collections are welcome.
What our customers say
SupeinNihonto was born from years of dedication to traditional Japanese martial arts such as Aikido, Kendo, and Iaido, and a deep passion for collecting authentic samurai weapons and armor.
I had an excellent experience with Supein Nihoto. I purchased a katana and a wakizashi, and both pieces are truly beautiful — carefully selected and of remarkable quality. You can immediately see the attention to detail and the seller’s passion for what he offers.
The packaging was also exceptional: all the documentation was perfectly arranged in a refined envelope, which added a very elegant touch to the whole experience.
As a thoughtful gesture, he even included a small katana kake stand as a gift, which I greatly appreciated.
Beyond the objects themselves, the seller was very helpful, responsive, and clearly knowledgeable. His selection is outstanding, and you can tell he deals in genuinely fine items.
Highly recommended — I would definitely purchase from Supein Nihoto again
Legit dealer of Japanese treasures ! This man loves his work is not just reselling items, at first he is a collector and does this out of true passion.
I received a beautiful tokubetsu hozon nihonto for Christmas from Supein. Actually my wife purchased the sword after receiving some helpful hints and recommendations lol. She knows absolutely nothing about nihonto but Supein walked her through everything honestly and I ended up with something beyond my dreams and expectations, honestly. The packing was exceptional, shipping fast and the sword itself a literal work of art. Supein has a lifetime customer now as my collection grows. Thank you!
I had been looking for a tachi with a lot of curvature for a long time and I called Supein Nihonto. They didn't have any tachi with the sori I was looking for, but I was treated with a lot of love and professionalism and we were talking for a long time. The next day I received a call from the shop, telling me that they had received new swords and that there was a tachi with a lot of sori. That same afternoon he already had a lot of photos of the sword and its measurements. I found the price good, especially if I compared it to other Spanish sellers of Nihonto. The shipment took a day and the package arrived in perfect condition, as the person in charge of the packaging puts a lot of effort into the work and the result is a strong packaging. Without a doubt, Supein Nihonto is my 100% recommendation!
