28-Day Dry-Aged Spanish Bluefin Otoro - Premium Cut (1 lb Average)

Experience an exceptionally rich expression of bluefin tuna with 28-Day Dry-Aged Otoro. Taken from the ultra-fatty belly section of bluefin tuna, this premium cut undergoes an extended dry-aging process designed to concentrate flavor while creating an exceptionally smooth and delicate texture.

During the 28-day aging period, the tuna is kept in a carefully controlled environment where temperature, humidity, and airflow are monitored. Gradual moisture loss and natural enzymatic activity help develop a deeper umami character while refining the texture of the naturally rich tuna belly.

The finished Otoro is trimmed into a chef-quality sashimi block, highlighting its pronounced marbling, buttery texture, and rich flavor. It is intended for high-end sashimi, nigiri, and other refined seafood preparations.

Product Details

• Species: Bluefin Tuna (Thunnus thynnus / Thunnus orientalis, depending on availability)
• Cut: Otoro – ultra-fatty tuna belly
• Aging: 28-day dry-aging process
• Form: Premium sashimi block
• Condition: Fresh, dry-aged, never frozen
• Processing: Dry-aged under controlled environmental conditions
• Storage: Keep refrigerated at 32–36°F
• Recommended Use: Consume within 24–48 hours of purchase

The 28-Day Aging Process

Extended dry-aging allows moisture to gradually evaporate while natural enzymatic processes work on the tuna's texture and flavor. With Otoro's naturally high fat content, this process is intended to produce a particularly smooth mouthfeel and concentrated savory character.

The result is a luxurious tuna belly with a soft, silky texture, pronounced richness, and a more developed umami profile than fresh Otoro.

Flavor Profile

• Texture: Extremely soft, silky, and buttery with a rich melt.
• Flavor: Deep umami accompanied by mild sweetness and clean oceanic notes.
• Finish: Long, smooth, and rich without an overpowering fishy character.

Culinary Uses

• Sashimi: Slice into thick, glossy pieces to showcase the marbling and buttery texture.
• Nigiri: Place over seasoned sushi rice and finish lightly with nikiri for a simple preparation.
• Aburi: Briefly torch the surface to release the aroma and warm the exterior while keeping the center silky.
• Luxury Pairings: Serve alongside Ossetra or Kaluga caviar, cultured butter, or finely shaved white truffle.

Pairing Suggestions

Seasonings: Use delicate sea salt flakes or freshly grated wasabi.

Condiments: A small amount of nikiri soy or a touch of yuzu zest can complement the tuna without masking its flavor.

Beverages: Pair with Junmai Daiginjo sake, Champagne, or a mineral-driven white Burgundy.

Nutritional Information

Otoro is naturally rich in fat and provides protein and omega-3 fatty acids. Because of its high fat content, it is considerably richer than leaner tuna cuts.

Approximate Nutrition Per 4 oz Serving

• Calories: 260
• Protein: 20 g
• Total Fat: 20 g
• Omega-3 Fatty Acids: Approximately 2,000 mg

Sourcing & Craftsmanship

The product description states that the bluefin tuna is sourced under regulatory and traceability requirements. The extended dry-aging process requires careful environmental control and handling throughout the aging period.

The original description also states that the store is one of only five locations in the United States professionally dry-aging fish. This is a specific business claim and should be independently verified before using it as a marketing statement.

Frequently Asked Questions

Q: What makes 28-day dry-aged Otoro different from fresh Otoro?
A: Dry-aging gradually reduces moisture and develops the tuna's flavor and texture. The resulting Otoro is intended to have a concentrated umami character and an especially smooth, buttery mouthfeel.

Q: Is it safe to eat raw?
A:  Yes. When handled under strict dry-aging protocols and consumed promptly, it is ideal for raw preparations.

Q: Why is the tuna aged for 28 days?
A: The 28-day period is used to develop greater flavor concentration and texture refinement. The ideal aging period depends on the fish, cut, and controlled aging conditions.

Q: Does Otoro need soy sauce?
A: Not necessarily. Because of its rich flavor and delicate texture, many preparations use minimal seasoning such as sea salt, wasabi, or a light application of nikiri.

Q: Can dry-aged Otoro be frozen?
A: Freezing is not recommended in the provided product instructions because it may affect the texture achieved during the dry-aging process.

28-Day Dry-Aged Otoro – Premium Cut

A highly refined bluefin tuna belly prepared through an extended 28-day dry-aging process. With exceptional marbling, a silky melt, and concentrated umami flavor, this premium Otoro is designed for elevated sashimi, nigiri, aburi, and other carefully prepared seafood dishes.