Hello,
Once again thank you for all the comments. I really appreciate them and the discussion is very valuable to me.
Thank you very much, I also think it is a very nice sword. Best in my collection to be honest.
Thank you!
I think you have a point here. I'm not planning to resell it (boost price with papers) just wanted to know if it is really Tadayoshi or not. I guess it will stay a mystery, to bad that sword itself can't talk
As for koshirae, I love it too. I think this is the most beautiful koshirae from all swords in my collection.
Another question, I was doing research about mon on the tsuba. It is similar to some clans/families mons, but not exactly the same. I asked the dealer and Shogo (famous Japanese culture youtuber) about it, they don't recognize it either. It is probably just decoration type of mon.
Any comments or ideas? Any chance it is related to a clan? According to craftsman that made koshirae tsuba is from late Edo period. It isn't signed unfortunately.
As for the sword price, I will keep it as a secret (I don't want to look like a fool if I overpaid). However, any comments about estimated (out of the hat) price are welcome.
Thank you very much to everyone for sharing the knowledge. I'm really happy to be a part of this forum/community!