For Edo•Mae(Tokyo) Style Sushi Restaurant, Tuna is the signature fish that defines their quality, style and artistry. Sushi chefs consider choosing their tuna one of the most important tasks at the fish market. It’s the highlight of the “omakase” or the equivalent of the main dish in French and Italian course meal.
To a sushi chef, a sushi restaurant without Maguro/Tuna is not a sushi restaurant. (Here is my article explaining the story)
I Had No Idea Tuna Is The King of The Fish at Sushi Bar
No-Ten, the head meat, by the spine. That is absolutely the best part, but you can only get four-to-five servings from…
Here are the detailed steps in making Tuna sushi (both nigiri and rolls).
1. First, get Tuna
When Japanese say tuna for sushi, it usually means, Maguro, Tuna with red flesh. There are mainly three kinds of Maguro used for sushi: Yellowfin, Bigeye and Bluefin. In the US (and some in Japan ), Albacore Tuna is also used for sushi, and they are called white Tuna.
Now, the first thing is to go purchase Tuna.
Here is a diagram showing parts of Bluefin Tuna.
Red Meat: A, B, C F
Toro (Fatty Tuna Belly): D, E
Price (high to low): D, E, B, A, C&F
A, B, C are all “Red” meat with B being the highest quality, A the second and C being the least. The reason is that C is closest to the tail. The tail meat is the leanest because it gets the most exercise, thus contains the least amount of fat.
D is “O-Toro” (the word “O” means big in Japanese, referring to the amount of fat, Toro coming from “melt in your mouth” texture feeling) or The Fattiest Tuna Belly. Notice the color of the meat is light pink and this is due to the fat content. E is the “Chu-Toro” or Medium Fatty Tuna belly, and F is Red meat.
As for the price, D is the highest, E the second and B, A followed by C and F being equal.
If this wad Bigeye, the chance of E being O-Toro is less and mostly, it will be Chu-Toro because Bigeye is smaller than Bluefin. Yellowfin is all red meat and rarely has Toro and if so, it’s more like “small” Toro.
It’s very unlikely you will see a whole Tuna at a retail store in Japan or the US (or anywhere else in the world) simply because it will be too much fish to eat for one household. In fact, most restaurants (in the US) usually get 1/4 Tuna already fillet because even for them, getting a whole Tuna is too much. (I’ve worked for one restaurant in LA, who occasionally ordered a whole Tuna.)
The amount of tuna a restaurant buys depends on the size of tuna, the size of the restaurant and the quality of the restaurant. If it’s Bluefin, most of the sushi restaurants in Japan gets the best part — belly with toro.
Here is a block of tuna, close to “D” in the diagram.
2. Cut into blocks called “Saku”
From here, you need to cut into small blocks for sushi. A block of tuna is called “Saku.”
Here is a picture showing you how.
3. Cut into thin slices
To cut tuna for nigiri, you need to cut against the grain, usually 30-degree angle or so, and about 1/4" or so thick. The most difficult part of the cutting is to determine how thick/thin to cut, as this will dramatically affect how your nigiri taste. In general, tuna tastes good when cut thick. When thin, it will lose the tuna flavor. You can experiment this by trying two different cuts: paper-thin cut and thick-cut tuna to see how they taste different. When slicing tuna, pull your knife backward instead of push forward, as you’d normally do to cut vegetables and meats.
4. Tuna Nigiri
Once you cut the tuna, you are ready to make nigiri. (Assuming you’ve already made sushi rice.)
These are the hand technique to form nigiri.
A reference video here:
5. Tekka/Tuna Roll
Cut a single strip of tuna, Nori length from Saku. Place sushi rice on Nori (on the rough side). It should look like this.
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