What is the difference between Bafun uni and Ezobafun uni?

While they are very similar to Green sea urchins (Bafun uni), Short-spined sea urchins (Ezobafun uni) are a size larger and have thick spines.

Green sea urchins are 5cm in diameter and Short-spined sea urchins are 10cm in diameter. Green sea urchins are distributed from the southern areas of Hokkaido down to Kyushu. Short-spined sea urchins are mainly distributed in the Hokkaido and Tohoku areas. The most commonly eaten green sea urchins that are Short-spined sea urchins in Japan.


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Revision date: October 15, 2018

Automatic reply mails from Sushi University

The reply from the reservation system is  based on the application by the guests autocratically. The original information of your reservation cannot be updated by our system. If there is a change, the new information will not be reflected in the following 4 automatic reply mails.

[Automatic reply mails from Sushi University]

1.The thank you mail to inform you the acceptance for your application

2.The mail to confirm your reservation

3.The mail to reconfirm your reservation : will be delivered the day before Sushi University

4.(only if) The mail to inform you the acceptance for your cancel


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Revision date: October 15, 2018

What is the difference between “鮨,” “鮓” and “寿司” (all ready “Sushi”). Most Japanese people don’t know the answer to this question.

As far as I know, there are three ways “sushi” is written on sushi restaurant curtains in Japanese kanji characters: 鮨, 鮓 and 寿司. Do you know the difference?

Broadly, in the Kanto area 鮨 is generally used while 鮓 is more common in Kansai. 寿司 is used commonly everywhere in Japan.

However, of the three, only 鮨 and 鮓 are seen in ancient Chinese literature. 鮨 was seen as a dictionary entry as early as the 5th to 3rd centuries B.C., and it’s origin is described as combining “fish” and “shiokara” (briny flavor) resulting in the term 鮨.

On the other hand, in A.D. 1st to 2nd century dictionaries, “鮓” appeared, and is explained to depict “a storage container for fish.” Toward the end of the second century 鮓 was used for the term “narezushi”.

But around the third century, the briny meaning of 鮨 and the term “narezushi*” written as 鮓 started to be used interchangeably. That is how the words were imported to Japan.

In Japan, the character “鮓” was often used in literature from the end of the Heian era to the end of the Edo era. Eventually the use of “鮨” was revived during the Meiji era (for unknown reasons). It was a natural transition that Kanto came to use “鮨” and Kansai came to use “鮓”.

Incidentally, the kanji “寿司” was created from the phonetics. Its use for celebratory occasions became commonplace throughout Japan.

*”Narezushi” is the primitive version of Japanese sushi. It means covering seafood with salt and then soaking in rice for a few years as a form of lactic acid fermentation, which brings out the acidity.


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Revision date: September 24, 2018

Assessing Fish at the fish market!

One important task of sushi chefs is going to Tsukiji every morning, looking at fish with their own eyes and assessing the quality. Having a good eye is important in order to get the highest quality possible, but this is cultivated by experience. They are also constantly obtaining information from the fishmongers at the market regarding what the best fish of the season and their localities. It’s almost a game as to whether they can get high-quality fish at the optimum price everyday. The skills of a sushi chef start with this assessment.


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Revision date: September 11, 2018

Why do most sushi restaurants have 8 seats at the counter?

At sushi restaurants, only the master chef makes the sushi. Depending on the shop, the apprentices don’t even touch the knives. The texture of a fish changes greatly with the way a fish is cut, drastically affecting the workmanship of the sushi. There is a clear difference in taste when the master makes a piece of sushi from when the apprentice does. It is also commonly thought that a sushi chef can only take care of about 8 customers at once while he is also preparing pieces of sushi, so most counters have around 8 seats.


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Revision date: August 6, 2018

Sushi trends

Foods made to go well with alcohol like ‘shiokara’ salted fish parts or dried mullet roe, don’t go well with shari (vinegar rice). Also, restaurants mainly serving alcohol and foods to pair with it are either bars or Japanese cuisine restaurants that may also serve sushi, but not Edo-style sushi. Many years ago sushi chefs would even get angry saying things like, “Sushi restaurants are not bars. If you want to drink, go next door!” Even Rosanjin wrote, “Sushi restaurants that served alcohol first appeared after WWII. Before the war sushi was served with tea.” In other words, Edo-style sushi restaurants originally didn’t serve alcohol. Perhaps it is true that the increase in sushi restaurants that feel like bars is a natural progression with time.


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Revision date: July 9, 2018