Jacques

Weak doesn't mean shingane a hada can be strong rough or weak. Nagayama says shinshinto hada is generaly weak (page 83). Would like to know who is this "reference"

Quickly, suriage is when part of the nakago is removed, O-suriage is when the whole nakago is.

肌立ち = Hadatachi or Hadatatsu = coarse (Nagayama's page 83) In no way it means shingane. ps keep your excuses to yourself, I now know who I'm dealing with

I see you're not familiar with the process. The tamahagane is not homogeneously loaded with carbon. making it more homogeneous and ridding it of impurities is the purpose of folding. It is this folding that creates the hada. The so-called Rai hada is a patch of hada that is less tight than the rest (hadatachi). it is obtained by inserting a piece of metal with a lower carbon content during the 5 or 6 final folding. I remember a Rai Kunitoshi tachi with this Rai hada on both sides of the blade in the mono-uchi, at exactly the same level and size.

A reliable reference to share or are they just words with no real content ?

Worth reading http://ohmura-study.net/994.html

If there's one thing I don't accept, it's people lying to discredit me. Until proven otherwise, the Nihonto meikan I own is a swordsmith's repertory, it does not deal with manufacturing techniques (the subject is not even broached). As for the Kokon Kaji Biko, this book was written by the shogunate's tester : Yamada, Yoshimutsu , and I challenge you to show me where it says what you claim it says. https://www.digitale.../bsb11175205?page=,1 ps the worst is that there are 4 (??) who like without even looking if what you say is true or not.

Which page? I have this book. I've yet to see a Kamakura sword showing shingane. From Nagayama's connoisseur book page 33

I never said it's shintetsu, there is no shintetsu in the swords of the Rai school and others from the Kamakura period. I doubt of the reliability of that reference. I must have had in hands over 300 swords from the Kamakura period, but I've never seen one showing shintetsu ; the methods employing it (Makuri Kobuse etc.) were invented in the early Muromachi period.

Rai hada is a kantei point but by no means a flaw, rather the sign of a very high-level forge.

Just the fact that there's no shintetsu in kamakura swords

Totally wrong.

典型作而出来傑矣 left column

Is spoke only fot the NBTHK as i don't trust others organisations My personal experience, I had a sayagaki made by Tanobe san for a wakizashi I owned. The kissaki on this waki has a major flaw (inclusion) and yet the sayagaki attests that the workmanship is excellent. Tanobe san has found a way to make ends meet, and you mustn't idealize him too much - he's a bit venal. Nothing to compare with shinsa's fees

I don't have any specific examples, but I've seen sayagaki on mumei (suriage) swords attributed to this or that swordsmith, even though the juyo had a different name. That said, a sayagaki is in no way a certificate of authenticity. Anyone can make one

Brian Doesn't talk about what you don't know, shinsa is shinsa, sayagaki is sayagaki. Shinsa is an expert panel, sayagaki is just a favorable opinion. Tanobe will give you a sayagaki for a gimei sword, but that same sword won't pass the shinsa test.

As I've already said, the wazamono ranking is irrelevant. For a start, a single sword was and all the smiths haven't be tested, especially the best from the Kamakura or Nanbokucho periods. This classification is not part of my criteria, just like the saidan mei, which adds nothing to the intrinsic value of the blade. The same goes for sayagaki, which are not free of charge, therefore are not really objective.

I don't like to talk about the price of a sword, but as I sometimes deal for collectors, here are my criteria (NBTHK papered swords only as i don't trust other oraganisations) Sugata = length, width, kasane. Blade condition (number of polishings probably received) Reputation of the smith (jo, jojo, saijo saku) Period of the smith's career during which the blade was forged (all smiths had a period when they were better) Quality of workmanship (most difficult to determine and only blade in hand) Once all these elements have been verified, we negotiate - there is never a fixed price.

Okay, someone prove me wrong, but with facts, not words with no real content. The world of Nihontö is extremely complex and cannot be approached like that. How many people here can decipher a hamon correctly? None, until proven otherwise. Precisely, after studying sugata (not so easy, in fact) that's what he should study and then move on to hamon. How can you tell whether a mumei sword is Bizen or Yamato if you can't read the hada? Did you know, for example, that in the Rai school, mokume is almost always mixed with itame? I just want to spare the beginner from cruel disillusionment, so that he knows that he's stepping into a highly complex world, and that just because he's seen a piece of metal in the shape of a saber doesn't mean he's done the trick. there's a lot of money behind all this. It's clear that I'm expressing myself a little harshly, but my bad English (and my nature) prevent me from being more diplomatic.

Okay, I'm setting the bar high, but you can't tell the difference between a nashiji hada and a konuka hada from a book. Having said that, I give an opinion and everyone can do what they want with it, it's not my problem. I would never have become a physicist without a teacher. I don't know any bakers who learned their trade from books, and I can go on and on.

Brian, Once I was talking to Zenon Vandamme (sword polisher) and I asked him about forums, do you know what he told me? "I never go on forums, they're full of crap!"

Tanto is signed Nobuhide 信秀 however very problably gimai

In my humble opinion, books are no substitute for the study of blades (in hand). Books are just a plus, because how can you tell a slightly hadadachi itame from an itame if you've never seen one? I therefore encourage people to see as many blades as possible, as this is the only way to make real progress.

See this old topic

Do you really think we can learn to read a hada from this video? If so, you really have some questions to ask yourself about your understanding of the subject.