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ChrisLehrer
03-14-2012, 12:27 PM
So as some of you know, I have this awful old usuba that's basically useless. It just hangs there on the rack waiting for me to find some use for it. I just thought of something to try, and I want your advice.

It's now shad roe season in Boston, which will continue for a few weeks. Shad is very cheap -- unless you want someone to take the bones out, since it has about 18 billion little teeny bones. I can get fabulous whole shad, roe included, for not much, but boned-out shad fillets with no roe cost $14/pound.

Now I could learn to bone shad, but even my favorite dude Jacques Pepin, who thinks everyone should be able to do every possible technique in the universe in under 30 seconds, thinks that you should probably have someone deal with shad bones for you. So, what to do?

Then I had a thought. Shad are in many respects like eels, which is part of why they have so many darn bones, have sweet and oily flesh, spend their days swapping between salt and fresh water, etc. So why not treat shad like hamo, i.e. pike conger eel, that Kyoto summertime favorite?

You know what's coming, some of you. There is this special Kyoto knife called a hamogiri. See, hamo have more bones than they have any right to, and there's no way to get them out without shredding the meat beyond recognition. So about 100-200 years back, somebody figured out that if you have a very heavy, sharp knife, and a very steady hand, you can resolve the problem by cutting through all the bones. You fillet the eel to remove the backbone and the main up-and-down frame. Then you shear downwards through the flesh and not quite through the skin, cutting ludicrously thin slices rhythmically, in the process shearing every bone into such tiny fragments that you can just crunch them up. The so-treated fish is usually blanched and then cooked in a number of possible styles (e.g. deep-fried, cooked in a hot-pot, etc.), commonly served with a strong citrusy sauce.

http://www.youtube.com/watch?v=9rHfj30yf_8
So why not do this with shad?

But a hamogiri as such is (1) ludicrously expensive and (2) dead useless for almost anything else. This one below is about $1500!!!!
2798
Though admittedly this one is only about $400...
2799

My thought: why not try to transform my craptacular old usuba into a sort of small-scale hamogiri? What's necessary:

(A) The blade needs to be very gently curved, and the tip should be more steeply curved in case it hits the board hard.
(B) The edge needs to be strongly micro-beveled, because bone-shearing is tough stuff.
(C) The knife needs to be heavy, which currently it's not especially.

So....

(A) How do I go about reshaping a near-straight usuba to be gently curved from about the midpoint toward the tip, in an even arc?

(B) This I can handle.

(C) My idea was to get two weights. One I would screw into the butt of the handle. The other I would want to attach somehow to the end of the knife, up at the spine. This is a kamagata usuba, so I figure I could mount the weight sort of halfway along the arc. Ideally I'd like to be able to take the weights off, so I can put the knife away in its saya. Any thoughts about how to go about this?

Thanks for any advice!

Chefdog
03-14-2012, 06:10 PM
I can't comment on the eel knife conversion, but I can about boning out shad. I have quite a bit of experience butchering fish and can say that with just a little practice shad isn't that difficult. It will take about 3 times as long as a regular round fish, but is definitely doable.
Buy a couPle boneless fillets along with a few whole fish. Take the fillets off the whole fish first and lay them out next to the boned ones. Just unfold the cuts on the bOneles fillets and examine where and at what angle the cuts are made to take out the extra rows of bones. Then try to duplicate those same cuts using whatever knife you like. After a few attempts you'll understand the anatomy better and it'll come easier. I use a honesuki for lots of smaller fish, but it's probably easier to use something thinner and flexible, like you'd use for flounder. Give it a shot, once you get it down it'll save you lots of $$$ on your food cost. Good luck

thombrogan
03-14-2012, 11:19 PM
You could weight the blade with magnets.

rhinoknives1
03-15-2012, 12:46 AM
You can regrind any knife as long as you keep it cool! Put a can/bucket of water near the belt grinder you are using and dunk and wipe dry anytime you are approaching to hot to hold with bare hands.

Take your time, You can always take off more metal, But it is very hard to put it back on.;)

Laurence

www.rhinoknives.com/

Keith
03-15-2012, 01:38 AM
He He Chris wat yo been smoken I want some:)

ChrisLehrer
03-15-2012, 11:29 PM
You could weight the blade with magnets.
Gosh, that's clever. Thanks Thom!

ChrisLehrer
03-15-2012, 11:29 PM
You can regrind any knife as long as you keep it cool! Put a can/bucket of water near the belt grinder you are using and dunk and wipe dry anytime you are approaching to hot to hold with bare hands.

Take your time, You can always take off more metal, But it is very hard to put it back on.;)
OK, but I was wondering about doing it by hand with a very coarse diamond plate -- the reshaping, I mean.

ChrisLehrer
03-15-2012, 11:30 PM
He He Chris wat yo been smoken I want some:)
:rolleyes:

thombrogan
03-16-2012, 09:17 AM
Keeping your diamond plate soaked with water will help resist the heat generated by hand grinding and adding an alkaline solution (soap, baking powder, ammonia, bitter teardrops...) helps keep corrosion down if you're grinding for a long period of time (and somehow keeps the diamond plates from loading better than tap water).

ksskss
03-16-2012, 01:45 PM
Chris, I remember that old usuba well :) I have a feeling it is cursed and that rather than hanging magnets, regrinding it, etc etc and finding out that a yellow steel mini-hamokiri isn't the way to go, you will be yet unhappy with the result. Imagining you with a Rube-Goldberg pseudo-hamo knife used for another task just doesn't seem to be a fit for a man with much finer tastes.

I would start from scratch and make the knife you want from something better than yellow steel and sell or give the knife to some aspiring Kaiseki chef who has to put in his time suffering.

---
Ken