Sushi 101: Learn how to eat raw fish like a pro

(CNN) — Sushi is a quintessential culinary experience for visitors to Japan, right up there with ramen and udon.

The most traditional way to enjoy sushi is with an omakase set menu, in which the chef chooses the bites of the day.

But for some travelers, attempting a set menu can be intimidating because of language and cultural barriers.

That’s where Sushi University comes in. Launched earlier this year, the experiential classes teach travelers about etiquette and the art of Edomae (Tokyo-style) sushi.

“I would like people from other countries who think sushi is just slicing fish and putting it on vinegar rice to understand that it is not that simple,” founder Tetsuya Hanada tells CNN Travel.

“Sushi is delicious even if you don’t know anything about it, but I wanted to get to the bottom of why it is delicious. That’s why I started Sushi University, which explains many things about sushi, history, etiquette and Japanese culture.”

Introducing Sushi University

A chef prepares sushi.

Sushi University

Part of the Tabimori travel service group — which also provides translation apps, route planners and local dining guide Useful Menu — Sushi University aims to overcome language barriers by providing interpreters and informational resources.

Each “class” takes place at a sushi restaurant, where a chef will kick off the evening with an introduction about the restaurant’s history, sushi philosophy, the menu and personal techniques.

Travelers then watch as the chef creates an omakase tasting menu. Along the way, students will learn about fish types and etiquette, and have an opportunity to converse with the chef with help from a translator.

“A common mistake is taking the topping off the shari (vinegar rice) and eating them separately,” explains Hanada.

“The balance of the topping, shari, wasabi and soy sauce is considered by the chef when preparing the sushi and it should be eaten in one bite.”

Other common no-nos include wearing pungent perfume (it interferes with the Edo-style sushi’s delicate flavors), smoking, chatting up the chef while he or she is at work, or letting the sushi sit on your plate too long (Hanada says it should be consumed within 10 seconds).

Sushi 101

A sushi chef at the World Sushi Cup Japan 2016.

TORU YAMANAKA/AFP/AFP/Getty Images

Hanada says to appreciate sushi, you should start with the basics.

Sushi is simply an overarching category that includes several variations. The most familiar worldwide is probably nori maki — or sushi and vegetables, rolled up in rice and seaweed. This covers your ubiquitous California and tuna rolls.

Then there’s nigiri (slices of fish over rice), sashimi (raw fish slices), chirashi sushi (rice bowls with toppings sprinkled on top), oshizushi (layers of pressed sushi), and Inarizushi (sushi wrapped in fried tofu).

While sushi has made its way around the world, it wasn’t always so easily accessible.

Growing up in Ibaraki Prefecture — just northeast of Tokyo — Hanada says this quintessential Japanese dish was saved for special occasions.

“Sushi is delicious even if you don’t know anything about it.”

Tetsuya Hanada, Sushi University founder

“I don’t think there were many families that had the luxury of frequenting sushi restaurants,” says Hanada.

“As far as I know, it wasn’t for common people. It was something that only politicians and actors or people in other specialty professions ate.”

With time, more affordable versions of sushi became available at convenience stores and chain restaurants, which Hanada says often keep prices down by using cheap imported seafood from overseas.

“Generally, the Edo-style is still reserved for high-end restaurants and can easily exceed 10,000 yen ($100) per person,” says Hanada. “People in Japan generally don’t go more than a few times a year.”

True Tokyo style

A Japanese chef slices sea bream during a sushi demonstration.

VINCENZO PINTO/AFP/AFP/Getty Images

At Sushi University, Hanada focuses on Edo-style (Tokyo-style) sushi, because it’s indigenous to the capital and deceptively complicated to master.

The phrase means a few things — literally “in front of” Tokyo Bay — and refers to an arduous style of sushi-making.

Sushi chefs train for five to seven years — it can be more than a decade — and sometimes don’t handle the expensive fish until four years into apprenticing.

“Edo-style sushi is the only type of nigiri sushi that cannot be made easily at home.”

Tetsuya Hanada, Sushi University founder

Thought to have originated in the 1800s, Edo-style sushi typically revolves around nigiri, featuring roughly 80 types of seafood toppings.

But just slicing raw fish and plopping it atop rice doesn’t count.

In addition to the basics, the chef also marinated and aged the fish, keeping it in a cold chamber with ice.

Not only was this a practical solution to extend shelf life during pre-fridge days, but it also enhanced the fish flavor.

“After the Edo-style process, the umami flavor is more condensed than when the fish was raw,” explains Hanada.

“I think Edo-style sushi is the only type of nigiri sushi that cannot be made easily at home.”

The best bites

But even if you can tell your nigiri from your maki, not every piece of sushi is created equal.

Great sushi depends on a few factors — and freshness isn’t necessarily one of them.

“It’s a mistake to believe that sushi will be delicious as long as it’s fresh,” says Hanada.

We meet up with Yumi Chiba to find out how she became one of the most renowned female sushi chefs in Japan.

“Sushi is delicious because a certain process is applied to this fresh fish and it is then served at just the right time.

“Customers should eat sushi when the inosinic acid, which is the main component of the umami flavor of fish, peaks. The chef arranges the fish days or even weeks in advance to meet this timeline.”

Aside from timing, what else affects sushi’s quality? Fish type and thickness, the chef’s technique, the season and the accompanying toppings.

“It’s a mistake to believe that sushi will be delicious as long as it’s fresh.”

Tetsuya Hanada, Sushi University founder

“Depending on the thickness of the fish and the angle of the knife, the texture of the fish differs — it can even taste sweeter than other cuts,” says Hanada.

“Most people are oblivious to the details and the daily fine-tuning that goes into these dishes.”

Seasonality is another crucial component of great sushi. In Japan, chefs closely monitor the seasons, even following 72 sub-seasons for added precision.

“What we eat changes with the changing of daylight hours, temperature and humidity,” says Hanada.

“I think it’s a very Japanese thing to really be aware of autumn when eating a seasonal fish like Pacific saury.”

But no matter the time of year, the most expensive fish tends to be Japanese Kuruma prawns, Pacific bluefin tuna and sea urchin.

“One piece with any of these toppings costs JPY1,000-2,000 ($9-18) to make any time of the year,” says Hanada.

“There is a limited number of natural resources for these toppings and it takes a lot to get them to the sushi restaurant.”

School’s in session

Class is in session.

Sushi University

Sushi University aims to make the experience as accessible as possible, providing round-trip transfers and translators.

Classes cost between $89 and $267, depending on the class level (Basic, Intermediate and Advanced).

Essentially, the basic course takes place at a casual sushi bar where Japanese salarymen might drop by after work.

The Intermediate course occurs at an upscale restaurant, and the Advanced course takes students to the counter of an esteemed chef.

The 75- to 90-minute sessions are currently available in English, Chinese, French and Spanish. In addition, Hanada plans to launch more languages ahead of the 2020 Olympics.

After enrolling in a class, travelers can browse the Visual Sushi Dictionary, which is brimming with handy pictures, background information and pronunciations.

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