Are you a fan of a nice fillet knife? Do you keep a sharpening stone nearby? Maybe you prefer electric knives. No matter you preference we’re guessing you didn’t spend $10,000 on your favorite piece of steel. Meet the guys who did. This video is from a bluefin tuna cutting at Mitsuwa Japanese Supermarket. In Japan, bluefin tuna can cost $80,000 or more, so this knife sword is relatively a bargain at $10,000.