Thanks everybody for the reply and the feedback. Especially for the eirakudo listing. I was sceptical on the information given, I´m not able to read or translate the nbthk paper nor the sayagaki myself, but i asked several AI to do so, and it seems to not match what they described in the listing. And @atm @Rivkin pointed out correctly, is very misleading and not strenghtening the trust in buying this.
Aoi on the other hand offered sayagaki from Mr. Tanobe sensei at a little extra cost, and they seemed more honest with the information given. I thought this would make that blade a little more interesting. They said their attribution to fuyuhiro (1st gen) is from their experience and not from the nbthk paper when i asked, and they trust that Mr Tanobe sensei would agree with their estimate.
As for budget, i was looking at blades between 0 and 1600000 yen. So there will be something left for import taxes, shipping and vat. which adds up quickly. Wish would be early edo period and below (muromachi, nanbokucho..). This probably already limits the amount of nihonto available, even more so if you look at my "wishlist" of specs.
If it came with a nice shirasaya and a well made sayagaki i´d be very happy.
I´m aware that there are modern smiths too which make very nice blades, sometimes with soshu influence. Those would be the nicest probably because of their overall condition and less polishing and scratches and such over the decades. Still i like having a piece with history in hand, just to imagine what it might have seen over the hundreds of years it was appreciated by other individuals.
Anyway, in november last year i was in Japan for the first time, so i went to every place that had swords on display that i could find. Saw a lot of nice blades, held none made tons of pictures and videos, but quickly realized that the blades who i would desire most, are likely out of budget. I found out that my taste in anything quickly turns up with the more expensive items... I´ve been collecting knives for years and oh you can get very pricey with them as well depending on materials and craftsmenship and so on. Until now, i have a tanto without papers from aoi, and a yari (also no papers) from touken komachi which is in the process of getting a koshirae made.
I´m trying to get familiar with all the terms of nihonto through reading:
The connoisseur´s book of Japanese swords and so on.
https://archive.org/details/connoisseursbook0000naga/page/n11/mode/1up
Anyway, just by looking at blades i quickly realized that i like:
Kissaki: chu-kissaki and better o-kissaki
Jihada: mokume-hada or itame-hada
Hamon: Hitatsura, Midare, choji and variations of those
Lenght: 66cm plus (just a personal preference)
I guess i´m looking at the usual suspects online. I´ve also checked in with unique japans mailing list, but missed 3 blades already, because the seem to sell within hours or even minutes after release, or are simply out of budget.
Probably because of my limited budget and desired specs, nihonto like that don´t show up that often online, and if they do they sell quickly. Hence i started looking at other nihonto that tick some boxes and are as close to what i desire as they get.
Thanks again for reading and your education.