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Japanese Tuna Knife maguro bōchō

Posted: Mon Feb 22, 2021 11:37 pm
by Doc Dan
Has anyone ever seen one of these knives? They are curved and can be up to 5 feet long! They are so sharp they will slice paper thin slivers off of a 1000 pound Tuna.

I wonder what kind of steel they use? The knife is flexible and it takes 3 men to use it to cut a big tuna. It is like a Samurai Sword for tuna.

I think some are made out of White Steel.

Re: Japanese Tuna Knife maguro bōchō

Posted: Tue Feb 23, 2021 3:09 am
by Messermann
I was thinking about ordering one up via Amazon until I saw the price. They make Randalls, any Randall, seem cheap in comparison: https://www.amazon.com/Yoshihiro-Heisei ... ast_sto_dp

Re: Japanese Tuna Knife maguro bōchō

Posted: Tue Feb 23, 2021 7:01 am
by yablanowitz
The only ones I've seen were on Forged in Fire on the History channel. It was the final "weapon" a couple of episodes back. Pretty impressive.

Re: Japanese Tuna Knife maguro bōchō

Posted: Tue Feb 23, 2021 2:22 pm
by TenGrainBread
See it in use here at 13:20:
https://youtu.be/hxFMm3q9ytQ

It's a $7k blade. One guy cuts, the other two hold the two sides of the tuna. It sounds like he is saying it's chisel ground, to get the cleanest cut. They sharpen it once a week.

Re: Japanese Tuna Knife maguro bōchō

Posted: Wed Feb 24, 2021 8:36 am
by Doc Dan
TenGrainBread wrote:
Tue Feb 23, 2021 2:22 pm
See it in use here at 13:20:
https://youtu.be/hxFMm3q9ytQ

It's a $7k blade. One guy cuts, the other two hold the two sides of the tuna. It sounds like he is saying it's chisel ground, to get the cleanest cut. They sharpen it once a week.
In a couple of the places where they lift it up, you can see one side is saber ground and the other side is flat, so it is a chisel grind. Interesting.

Re: Japanese Tuna Knife maguro bōchō

Posted: Wed Feb 24, 2021 1:24 pm
by JRinFL
This thread needs pictures!

Here is one at Wikipedia: https://upload.wikimedia.org/wikipedia/ ... knives.jpg

Zoomed in on the blades.
Screen Shot 2021-02-24 at 2.23.05 PM.png