From ice to art: The journey of full thawing and the science of 0.5℃
It is difficult to imagine that tuna, now the pinnacle of a refined meal, was once used as fertilizer for fields. Before the development of freezing technology, the high fatty acid content of the fish meant that spoilage began the moment it left the water. At room temperature, the quality would vanish almost instantly.
Premium tuna reveals its depth like a blooming flower.
Freezing technology transformed a fish that was once discarded into the height of gastronomy.
In many ways, exceptional tuna is a gift of science.
The delicate hidden scales of the tuna, a mark of its origin.
The introduction of ultra-deep -60℃ freezing was the turning point that allowed tuna to be enjoyed as a luxury.
Today, we share the philosophy of how Goldtuna takes this frozen raw material and elevates it into a culinary experience that surpasses even fresh-caught fish.
Selecting the finest belly portion (72kg) from a massive bluefin.
1. The Standard of Ingredients: Beyond the "fledglings"
True quality begins with the weight class of the fish, long before any technique is applied.
Farmed or Young Tuna (60~100kg): These often lack sufficient marbling and present a pale color with simple, linear flavors. We consider these "fledgling" tuna.
The Goldtuna Commitment (250kg and above): We exclusively source Large Northern Bluefin (No. 9 Grade) that have roamed the deep ocean for over a decade. The firmness of the flesh and the density of the fat layers can only be found in this weight class.
The sight of a perfect specimen brings an instinctive smile.
2. The Mastery of Thawing: Restoring the Vitality
Transforming -50℃ frozen tuna into the silkiness of fresh fish is a delicate craft. It is the difference between simply thawing a fish and restoring its original texture.
|
Category |
Conventional Thawing (Partially Frozen) |
Goldtuna Full Thawing |
|
Salinity |
Plain water or random brine |
3~3.5% Precise Brine (Sea-water level) |
|
Moisture Control |
1~2 paper towel changes |
Minimum 5 changes (Full extraction) |
|
Texture |
Icy and brittle |
Supple, buttery, and fresh |
|
Flavor |
Muted due to cold temperature |
Deep umami from melting fat |
Comparing cuts: The depth of flavor is visibly superior on the left.
3. The Art of Stabilization, Not Just Aging
While many speak of "aged tuna," the true secret lies in stabilization. Because of its high fat content, over-aging can lead to an undesirable fishy aroma.
The Science of 0.5℃: Below 0℃, the tissue remains too rigid; above 1℃, oxidation accelerates. At Goldtuna, we maintain a precise environment of exactly 0.5℃ to stabilize the delicate fat layers.
Maximized Inosinic Acid: This process allows the umami components to peak, creating that quintessential sensation of tuna melting like ice cream on the palate.
Visiting the source: Ultra-deep freezing at -60℃.
4. Five Stages of Patience
The most demanding part of the process is the repetitive moisture extraction. Tiny amounts of water released during thawing are the primary source of fishy odors. We change the specialty thawing paper more than five times to ensure every drop of excess moisture is drawn out. Only through this labor do we achieve the elastic yet tender texture that yields beautifully under a pair of chopsticks.
The final plate, moments before it reaches the guest.
6. Conclusion: True tuna is defined by warmth, not a chill
The criterion for distinguishing a true tuna specialist is simple.
"Do you feel the bite of the cold,
or the gentle warmth of
fats melting at room temperature?"
At Goldtuna, we rely on scientific stabilization rather than mere intuition. We invite you to experience the moment when tuna is no longer a cold dish, but a moment of melting warmth.
The pinnacle of a perfectly thawed bluefin.
Menu and Course Sequence
Lunch: Course B (35,000), Course A (45,000), Lunch Special (60,000)
Dinner: VIP Special (80,000), Royal Special (100,000), Omakase Special (130,000)
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①Tuna Porridge → ②Tuna Salad → ③Fish Ball → ④Grilled Mushroom → ⑤Main Tuna Sashimi → ⑥Sushi Selection → ⑦Chef's Special Service → ⑧Monkfish Liver (Ankimo) → ⑨Grilled Sea Bream → ⑩Beef Tteok-galbi → ⑪Chicken Karaage → ⑫Cream Shrimp → ⑬Udon → ⑭Temaki → ⑮Ice Cream |
The comprehensive 15-course dining experience.
Reservations and Contact
Goldtuna Bangi: 109-11 Bangi-dong, Songpa-gu, Seoul
Reservations: 0507-1420-7747
Directions: Songpanaru Station (4 min), Jamsil Station (10 min)
Valet: Integrated management at the Nolboo Duck Jamsil booth
Goldtuna Sinsa: 532-2 Sinsa-dong, Gangnam-gu, Seoul
Reservations: 0507-1394-0484
Directions: Sinsa Station, Apgujeong Station (10 min)
Valet: Please call upon arrival for parking assistance.