this post was submitted on 27 Sep 2024
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[–] simple@lemm.ee 35 points 1 month ago (26 children)

While you were out there whacking your straight stick, I spent years studying the blade...

Katana snaps in half after first swing

[–] Egg_Egg@lemm.ee 16 points 1 month ago (4 children)

The whole "Japanese steel was really weak" thing is as much of a myth as the whole "katanas are super powerful superior weapons" thing.

They're all just swords, and don't make that much of a difference either way.

[–] ShaunaTheDead@fedia.io 18 points 1 month ago (3 children)

Katana's are weak on the flat side. They aren't really meant to be used for parrying. In fact, most sword fights in Japan would be over after the first or second swing. It was commonplace to hold the grip of a katana but not draw it in such a way so that your enemy has trouble judging how long your katana is and what is a safe distance to be from you. Once your opponent is in range, draw it quickly and kill them in one blow, ideally.

The act of killing your opponent in a single blow is called "nukitsuke" from "nukiuchi" meaning "to cut down an opponent" and "tsuke" meaning "to stop an opponent's attack before it begins".

The Sekiro and popular media image of extended katana fights didn't really happen, but if they did, there would almost certainly be some broken katanas.

[–] superkret@feddit.org 8 points 1 month ago (1 children)

I promise you, in the real world, fights were just as much of a shield shoving match while trying to slash your opponents ankle as they were in Europe.
The idea of a one-on-one sword fight decided by individual skill is much more of a romantic idea.

[–] Prunebutt@slrpnk.net -2 points 1 month ago (1 children)

just as much of a shield shoving match while trying to slash your opponents ankle as they were in Europe

lolwut? Try that leg-targetting shit with a HEMA fighter and see how fast you'll bleed out.

[–] Maggoty@lemmy.world 3 points 1 month ago

HEMA is not combat. It's tournament fighting. In combat you've got a thousand spearmen on either side looking to stick you with a sharp stick wherever they can.

[–] TriflingToad@lemmy.world 6 points 1 month ago

I imagine it like a hockey match where when a stick breaks they just go get another one and continue on like nothing happened

[–] Eiri@lemmy.ca 2 points 1 month ago* (last edited 1 month ago) (1 children)

According to the dictionary, 抜き打ちnukiuchi and 抜き付けnukitsuke sound like synonyms. I'm a little confused.

I guess with uchi (to strike down) vs tsuke (to put, attach, etc) one sounds more like the result and the action but it's weird that the definitions from Jisho.org aren't too explicit.

[–] ShaunaTheDead@fedia.io 1 points 1 month ago

I think because "nukiuchi" would be pronounced like "NOO-KEE-OO-CHEE" and "nukitsuke" would be pronounced like "NOO-KEE-SOO-KEE" so kind of similar. I dunno though!

[–] TranscendentalEmpire@lemm.ee 13 points 1 month ago (2 children)

According to whom?

The reason why Japanese iron is inferior is because of the source of the iron itself, they utilized iron sand instead of rock ore. Rock ore can be made up to 90% ferrous material while the iron sand contains as little as 2%.

This means when you smelt your source material into blooms of iron and slag, the blooms made from sand iron were much smaller. Instead of utilizing a single bloom to make a sword, the Japanese had to work several blooms together. Which is much more labour intensive, and can lead to a lot of imperfections in the final product.

This is why katanas were made out of so little material, and had to be handled with care. They were much more fragile pieces than similar swords made in Korea and China at the time.

Plus, the Japanese developed their iron working much later than their mainland contemporaries, as they never independently invented furnace technology. The technology for furnaces was imported, most likely from the Korean peninsula.

[–] Eiri@lemmy.ca 1 points 1 month ago

There's also smelting. Japan didn't have the technology to completely melt iron, which complicates things.

[–] PM_Your_Nudes_Please@lemmy.world 7 points 1 month ago (3 children)

Yeah, Japanese steel wasn’t great, but they were working with what they had available at the time. Katanas were basically made out of iron dust, which had been melted into slag by filtering through charcoal. The resulting chunks of steel were basically straight up slag, not nice even ingots. So the steel they got was actually extremely high carbon in places, but that also meant it was brittle as hell, because those carbon pockets were prone to shattering.

So the folding was invented, to even out the steel’s carbon content (just like how a Damascus steel blade has visible stripes, Japanese steel had invisible stripes of high and low carbon steel) and to lower the carbon content overall; Every time you heat for another fold, you’re evaporating some carbon. So the folding process took the steel from extremely high carbon pockets to a more evenly distributed carbon content.

Now that modern steel processing exists, the only real reason to stick to the folding method is tradition. There’s no need to fold modern steel ingots because they’re already homogenous and can be produced at whatever carbon level you want.

[–] Egg_Egg@lemm.ee 3 points 1 month ago

Impurities are melted into slag. Not the iron. That's what slag is.

[–] Annoyed_Crabby@monyet.cc 2 points 1 month ago (1 children)

Now that modern steel processing exists, the only real reason to stick to the folding method is tradition.

And looks. Those folding create a wavy pattern on the blade which is desirable feature for collector.

If you’re referring to the wavy pattern along the cutting edge, that’s not from the folding process. The hamon is added to the blade during the quenching process, by adding clay to the steel. The clay causes the covered steel to heat differently than the uncovered steel. That differential heating is what is visible as the hamon.

It’s largely decorative, but does have function as it determines what part of the blade can be sharpened to an edge.

[–] Pulptastic@midwest.social 1 points 1 month ago

There is still benefit to hot forging the steel to refine and align the microstructure, but it doesn’t have to be many folds.

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