Bluefin Tuna Otoro Saku Block

Otoro saku block is the belly of the Atlantic bluefin tuna (Thunnus thynnus) cut into a neat, rectangular block — the format used in professional sushi kitchens for precise, uniform slicing. Otoro is the fattiest section of the entire fish, taken from the base of the lower loin, with pale pink flesh, heavy marbling, and a soft, rich texture that melts on the palate. Each bluefin yields only a small quantity of otoro, which is why it remains the most prized and most expensive cut in Japanese cuisine.

The saku block format gives you full control over how you portion the fish. Slice it thin for sashimi, thicker for nigiri, or dice it for tartare — the consistent rectangular shape means every piece is even and clean. This is the same format professional chefs work with, and the reason saku blocks are the standard for high-end raw preparations.

This otoro is supplied by Fuentes (Ricardo Fuentes e Hijos S.A.), the Cartagena-based Spanish producer and the world's largest exporter of bluefin tuna. Fuentes bluefin are wild adult fish caught by purse seine in the Mediterranean and Eastern Atlantic under ICCAT-regulated quotas, then transferred to open-sea farms where they are fed a natural diet of sardine, mackerel, and herring. Each fish is dispatched individually using the Japanese ike jime technique and is fully traceable from sea to table. FINE & WILD inspects each whole tuna for freshness, grade, and colour before selecting cuts. The otoro is blast frozen to −50°C and stored at −60°C to lock in quality. This freezing protocol also eliminates parasites, making the tuna safe to eat raw without further treatment. Every effort is made to remove bones, though they may occasionally be present.

Frozen tuna may appear slightly darker after defrosting due to natural oxidation; this does not affect flavour, texture, or safety.

Producer: Fuentes (Ricardo Fuentes e Hijos S.A.), Cartagena, Murcia, Spain

Ingredients: Atlantic bluefin tuna (Thunnus thynnus)

Storage: Store frozen. Once defrosted, refrigerate and consume within 24 hours. Do not refreeze.

Allergens: Fish (tuna)

Order Cut-Off Times & Delivery Date Selection

Orders placed before 2 PM (Monday to Friday) are dispatched the same day, unless you select a future delivery date at checkout.

Our Delivery Service

We use reliable third-party express courier services and high-quality insulated packaging. While our couriers are generally excellent, occasional delays can happen. We pack everything to stay fresh, even if transit takes a little longer.

Time-Sensitive & Event Orders

Can we guarantee delivery on a specific day? Unfortunately not - we rely on third-party couriers and can't control their schedules. All items leave us in perfect condition with good use-by dates, but final timing depends on the courier.

If your order is for a specific event, let us know in the notes section at checkout. We can often dispatch a day earlier to give you the best chance of timely arrival.

DELIVERY Changes After Dispatch

Once dispatched, your package is with the courier and we're unable to redirect it or change delivery details.

Saturday Delivery

Saturday delivery is available, though please note our couriers don't operate phone support at weekends and our office is closed. For event-critical orders, a weekday delivery gives us more flexibility to help if any issues arise.

Full delivery details and shipping rates: here