Sushi chefs are also extremely particular about the salt they use.

Salt is as important an ingredient in sushi as vinegar is. Special, natural salt is always used in sushi. This kind of salt has not only sodium, but also trace amounts of various minerals including potassium, calcium and magnesium. Types of natural salt include that made from seawater or lake water or rock salt and each restaurant selects the type of salt they use carefully.

For example, rock salt from Mongolia, Chile or the Andes will differ from solar salt found in Tosa or the Brittany Guérande. There is an amazing variety of salt selected by each sushi chef based on how well it goes with his own toppings and shari (vinegar rice).


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Revision date: November 19, 2018

What is Umami?

Umami describes the delicious taste of savory flavor essences. For many years, people held to the belief that humans can taste only four basic flavors (sweet, sour, salty, bitter) unitil a japanese chemist named Kikunae Ikeda discovered a fifth flavor (glutamic acid) in the early 20th century.

The main umami ingredients are glutamic acid in seaweed, inosinic acid in dried bonito and meats, succinic acid in shellfish, guanylic acid in shiitake mushroom.

Many ingredients contain a wide variety of umami essences. In combination, they create a  synergistic effect which produces an even more potent savory flavor.


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Revision date: October 31, 2018

What is the difference between Kitamurasaki uni and Murasaki uni?

Purple and Northern sea urchins (Kitamurasaki uni) are very similar, but Northern sea urchins (Murasaki uni) are a size larger than their Purple counterparts. Purple sea urchins are about 6cm in diameter and Northern sea urchins are around 10cm in diameter. Purple sea urchin habitats are generally found in warmer ocean areas such as Kyushu or China regions while the Northern sea urchins are found in colder waters around Hokkaido and Tohoku areas. The purple-colored sea urchins commonly found at markets are generally Northern sea urchins.


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Revision date: October 22, 2018

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

About a conger eel, there are two way to make sushi, “skin-up ” and “skin-down”. Do you know the difference?

The naval (actually the anus) in the middle of the body serves as the border separating the head part (top) and tail part (bottom) of the eel. The fat is distributed better on the top. People used to say that since the bottom moves more it is more tasty, but is this really true?

It’s also often said, “the top should be served skin-up and the bottom should be served skin-down.”

Skin-up means that the skin side is on top and the meaty side is on the rice.

Skin-down means that the meaty side is facing up and the skin side is on the rice.

Conger eel easily melts apart when it is boiled and broth enters the part where it separates, so the appearance is not as appealing. But unless the crack is extremely obvious, both the top and bottom of the conger eel is often prepared skin-down in sushi.


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Revision date: August 27, 2018

The migrating route of Inshore bluefin tuna and fishing place!

Tuna caught in the coastal regions of the Japan Sea is notable as the best bluefin tuna in January. Iki, a small island in Kyushu area is one of the famous ports for tuna.

In February and March, the tuna auction market becomes slack due to rough weather. Just a few tunas from Nachikatsuura where is also the famous port for tuna are on the market.

In March and April, tunas become thin because their eggs need many nutrients.

In May, large tuna is seldom seen in the Tsukiji Fish Market. Even if there is, its body is really thin. “Kinkaimono” which means a shore-fish is generally considered as high-class tuna, but in this season, imported tuna is useful instead.

It is said that Pacific Bluefin tunas spawn around Japanese waters between Taiwan and Okinawa in April and May. And then, they go up to fertile, north sea along the eastern coast of Japan.

In June, “Chubo” which is young and small tuna is taken hugely off the coast of the Sea of Japan. The school of Chubo begin moving northward in this season.

In July and August, tunas can be seen occasionally but their bodies are still thin. Instead, Boston Tuna which is caught in the Atlantic Ocean and nicknamed “Jumbo” is on the market. Its fresh is softer than “Kinkaimono” and it doesn’t have medium-fatty part which “Kinkaimono” has.

In September, Boston Tunas are at their best with plenty of fat on them. The best season of Boston Tuna is limited and ends in October. But fortunately, Japanese tunas come into season.

The school of tunas split up into two groups, the one takes Pacific Ocean route and another takes the Japan Sea route and both of them move northward along the Japanese Islands. Some of them reach the Tsugaru Strait where and the season of Tuna begins from September to next January. Oma town and Toi town is famous nationwide for its catch of tuna from the Tsugaru Strait. The flavor of tuna in September is still weak but it becomes stronger in October. In November, feed of tunas such as Pacific saury or Japanese common squid with plenty of fat increase and flavor of tuna also gets stronger. In December, the peak season comes around.

A catch of tuna falls off in January and it enters the final season. The temperature of sea water gets cold and feed of tuna, squids decrease and the fishing season in this area ends.


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Revision date: August 20, 2018

Why can’t Pacific saury be caught?

On the Pacific Ocean side of Japan there is a three-way deadlock between sardines, mackerel and Pacific saury. There is a theory that the species take turns with increasing and decreasing populations. In recent years there has been an increase in sardines and, in turn, there has been a decline in Pacific saury.


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Revision date: July 30, 2018

What is the difference between maturing and rotting?

When fish die, stopping the supply of ATP (Adenosine Triphosphate), the source of muscle energy, the muscle fibers gradually harden. As time passes, it gently dissolves and the ATP breaks down, changing into umami components due to self-digestion. The umami created by self-digestion of ATP is “maturing” and the process after that is “rotting.”


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Revision date: July 23, 2018

We’ll introduce all sushi toppings throughout Japan, from Okinawa to Hokkaido!

<Akami-Red flesh fish>

Binnaga maguro-Longfin white tuna

Katsuo-Bonito (Oceanic bonito, Striped tuna)

Kihada maguro-Yellowfin tuna

Maguro (Kuromaguro, Honmaguro, Shibi)-Bluefin tuna

Makajiki-Striped marlin

Mebachi maguro-Bigeye tuna

Mekajiki-Swordfish

Minami maguro (Indo maguro)-Southernbluefin tuna

Suma-Wavyback skipjack, Eastern little tuna

<Shiromi-White flesh fish>

Ainame-Green ling

Amadai-Horsehead tilefish

Ara-Rock-cod

Buri-Japanese amberjack

Ebotai (Ibodai)-Butterfish

Engawa-Thin muscle of the dorsal fin of Japanese flounder, Marbled sole, etc.

Fugu (Torafugu)-Globefish (Blowfish, Puffer )

Hiramasa-Amberjack

Hirame-Japanese flounder (Olive flounder)

Hoshigarei-Spotted halibut

Houbou-Bluefin searobin

Inada-Japanese amberjack (30〜40cm)

Isaki-Striped pigfish

Ishidai-Barred knifejaw

Ishigarei-Stone flounder

Kamasu (Akakamasu)-Barracuda

Kanpachi-Greater amberjack

Kasugo (Chidai, Kidai)-Baby Red sea-bream (Crimson sea-bream, Eellowback sea-bream)

Kawahagi-Filefish

Kijihata(Akou)-Redspotted Grouper

Kinki (Kichiji)-Thornhead

Kinmedai-Splendid alfonsino

Kochi (Magochi)-Bartail flathead

Kue-Longtooth grouper

Kurodai(Chinu)-Blackhead seabream

Kurosoi-Black rockfish

Mahata (Hata)-Grouper (Rock-cod, Seven band grouper)

Makogarei-Marbled sole

Matsukawagarei-Barfin flounder

Mebaru-Rockfish

Medai-Japanese butterfish

Meichidai-Nakedhead

Mejina-Greeenfish (Nibbler, Rudderfish)

Mutsu-Japanese bluefish

Nametagarei (Babagarei)-Slime flounder

Nodoguro (Akamutsu)-Blackthroat seaperch

Okoze (Oniokoze)-Devil stinger

Sakuramasu-Cherry salmon

Satsukimasu-Sasu salmon

Sawara-Japanese spanish mackerel

Shimaaji-Crevalle jack (Trevally)

Suzuki-Japanese seaperch

Tachiuo-Largehead hairtail (Cutlassfish, Scabbardfish)

Tai (Madai)-Red sea-bream

Tara (Madara)-Pacific cod

Umazurahagi-Leatherfish

<Hikarimono - Silver-skinned fish>

Aji (Maaji) - Japanese horse-mackerel

Ayu - Ayu

Gomasaba- Spotted mackerel

Hamo -Daggertooth pike conger

Hatahata - Japanese sandfish

Iwashi - Sardine

Kisu - Japanese whiting

Kohada - Gizzard shad

Mamakari - Big-eye sardine

Saba - Pacific mackerel

Sanma - Pacific saury

Sayori - Halfbeak

Shinko - Baby Gizzard shad

Tobiuo - Japanese flyingfish

<Ika/Tako-Squid/ Octopus>

Aori ika-Bigfin reef squid

Hotaru ika-Firefly squid

Iidako-Ocellated octopus

Kensaki ika (Shiroika)-Swordtip squid

Mizudako-North-pacific giant octpus

Shin ika-Baby cuttlefish

Sumi ika (Kouika)-Cuttlefish

Surume ika-Japanese common squid

Tako (Madako)-Octopus

Yari ika-Spear squid

<Kai-Shell>

Akagai-Ark shell

Aoyagi (Bakagai)-Rediated trough-shell (Surf-clam)

Awabi (Kuroawabi)-Japanese abalone

Baigai-Japanese ivory-shell

Ezoawabi-Ezo-abalone

Hokkigai-Hen-clam

Hotate-Common scallop (Giant ezo-scallop, Frill, Fan-shell)

Ishigakigai-Bering Sea cockle

Iwagaki-Rock-oyster

Kaki (Magaki)-Oyster

Kobashira-The adductor of bakagai shellfish (Rediated trough-shell)

Madakaawabi-Giant abalone

Megaiawabi-Disk abalone

Mirugai (Honmirugai)-Otter-shell (Keen’s gaper)

Namigai (shiromiru)-Japanese geoduck

Nihama-Common orient clam (Japanese hard clam, White clam)

Sazae-Spiny top-shell

Shirogai (Manjugai, Saragai)-Northern great tellin

Tairagi (Tairagai)-Pen-shell (Fan-shell)

Tokobushi-Tokobushi abalone

Torigai-Egg-cockle (Heart-shell)

Tubugai (Matsubu)-Ezo-neptune (Whelk, Winckle)

<Ebi/Kani-Prawn/Crab>

Aka ebi-Argentine Red Shrimp

Ama ebi-Deepwater prawn (Deepwater shrimp, Pink prawn)

Black tiger (Ushi ebi)-Black tiger

Botan ebi-Botan shrimp (Pink prawn, Pink shrimp)

Gasa ebi-Argis lar

Ise ebi-Japanese spiny lobster

Kegani-Horsehair crab (Korean crab, Kegani crab)

Kuruma ebi-Kuruma prawn

Sakura ebi-Sakura shrimp

Shako-Squilla (Mantis shrimp, Edible mantis shrimp)

Shima ebi-Morotoge shrimp

Shiro ebi (Shira ebi)-Japanese glass shrimp

Tarabagani-King crab (Alaska king crab, Red king crab)

Zuwaigani-Snow crab (Queen crab, Zuwai-crab)

<Others>

Akauni-Red sea urchin

Anago-Japanese conger

Bafununi-Short-spined sea uruchin (Green sea urchin)

Ezobafununi-Short-spined sea urchin

Hoya-Sea squirt

Ikura-Salmon roe

Kazunoko-Herring roe

Kitamurasakiuni-Northern sea urchin

Komochikonbu-Herring spawn on kelp

Murasakiuni-Purple sea urchin

Namako-Sea cucumber

Noresore-Young Japanese conger

Shirako-Globefish testis

Shirohige-White spin sea urchin

Sirauo-Icefish

Tamago-Egg omelet

Unagi-Japanese eel

<Norimaki-Seaweed roll>

Anakyu maki-Gizzard shad and Cucumber roll

Himokyu maki-Mantle of ark shell and Cucumber roll

Kanpyou maki-Sweet-simmered kanpyo (dried gourd strip) roll

Kappa maki-Cucumber roll

Kohada maki-Gizzard shad roll

Namida maki-Vinegared rice and thin strips of Wasabi rolled in seaweed

Negitoro maki-Green onion and toro roll

Shinko maki-Pickled radish and shiso plant roll

Takuwan maki-Pickled radish roll

Tekka maki-Norimaki sushi roll with red tuna and grated wasabi at the core.

Torotaku maki-Toro and Pickled radish roll

Umeshiso maki-Pickled ume and shiso plant roll


We hope this information will be helpful.

Revision date: July 16, 2018

10 pieces of sushi we recommend for July

Marbled flounder (Makogarei)

Japanese sea bass (Suzuki)

Southern Bluefin tuna (Minamimaguro)

Young Gizzard shad (Shinko)

Disk Abalone (Awabi)

Striped jack (Shima aji)

Kuruma prawn (Kuruma ebi)

Japanese sardine (Iwashi)

Northern sea urchin (Kitamurasaki uni)

Short-spined sea urchin (Ezobafun uni)


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Revision date: July 2, 2018

What are Meji , Chubou and Maguro?

The bluefin tuna goes by different names in Japanese depending on its age. It starts out as “Meji,” grows into “Chubou” and finally is called Tuna (once it’s 50 kg or more).

Meji are less than 1 year old and weigh around 10 kg.

Chubou is an old word for relatively low-class Buddhist priests who were treated as errand boys. I guess it was meant to imply that these boys were even weaker than tuna. At this stage the fish are between 2-5 years old and weigh about 40kg.

Anything larger than that are called Maguro. The biggest is 3m long and 600kg or more. Especially large tuna are called Shibi. “Shibi” comes from the Japanese characters for “4-days”, which is how long the fish takes to mature.

Most meji and chubou are caught from May until the beginning of autumn when the tuna are thin and tasty.

Meji has its own unique scent and taste that sets it apart from full-grown tuna. The color is similar to the skipjack rather than bluefin. On the other hand, chubou has a lighter color and it isn’t as rich, but the flavor is young, refreshing tuna. That is why meji is considered to be a completely separate sushi topping and chubou is presented to be a type of tuna.


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Revision date: September 14, 2018

Are the most prestigious sushi restaurants all in Tokyo?

It is called Edo-style sushi, so the most appropriate place to eat it is Tokyo, formerly known as Edo. The skills of chefs raised in this long history of sushi. The best fishery products in Japan — no, in the world, are all found at Tsukiji Market. There is no question that combined with the veteran sushi experts, Tokyo is the battleground for sushi restaurants and where you’ll find the most prestigious locations.


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Revision date: June 11, 2018

People all over the world tend to be forced to eat sushi with fake or substitute fish!?

Seafood product buyers tend to believe that the products they are purchasing are as described by the sellers. But, that isn’t always the case. Seafood products are sometimes intentionally labeled incorrectly for profit.

This is seafood fraud. Fraudulent actions like this threaten the safety of the food. From the FDA’s “Report on Seafood Fraud”

70% of seafood consumed in the US is eaten at restaurants. The products served at restaurants are generally lower quality than those sold in retail outlets and the sushi is especially appalling. Unless visiting a top-class sushi restaurant (where the prices are, of course, high), you can usually expect to be served the worst of the worst.

There isn’t much a consumer can do about this, but at the very least you can educate yourself on types of fish that are often substituted. If you were to order White Tuna or Red Snapper, you would very likely be served something else. Any shrimp ordered was probably farmed.

There are no laws regulating “Fresh” or “Organic” labels so don’t be fooled by these. In the same way, be suspicious when you see word combinations like “Great Sushi” or “Great Sashimi.” There is no such thing as “Great” in this sense.
By Larry Olmsted, a print columnist for two of America’s three national newspapers, Investor’s Business Daily and USAToday

*FDA・・・Food and Drug Administration


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Revision date: June 4, 2018

10 pieces of sushi we recommend for June

Marbled flounder (Makogarei)

Japanese sea bass (Suzuki)

Japanese whiting (Kisu)

Southern Bluefin tuna (Minamimaguro)

Japanese egg cockle (Torigai)

Japanese scallop (Hotate)

Kuruma prawn (Kuruma ebi)

Disk Abalone (Awabi)

Japanese sardine (Iwashi)

Short-spined sea urchin (Ezobafun uni)


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Revision date: June 1, 2018

10 pieces of sushi we recommend for May

Chicken grunt (Isaki)

Japanese whiting (Kisu)

Bigfin reef squid (Aori ika)

Lean meat of tuna (Akami)

Medium Fatty Tuna (Chutoro)

Benito (Katsuo)

Squilla (Shako)

Japanese icefish (Shirauo)

Broad velvet shrimp (Shira ebi)

Japanese egg cockle (Torigai)

Common orient clam (Nihamaguri)


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Revision date: April 30, 2018