Itoyori (Nemipterus virgatus, threadfin bream) is a demersal fish used as the premium raw material for high-grade surimi. Vietnamese processors produce itoyori surimi in graded blocks — SA being a leading Japanese-standard grade — prized for white color and strong gel strength in crab sticks and kamaboko.
What Is Itoyori (Threadfin Bream)? A Buyer's Guide to the Surimi Raw Material
Itoyori (Nemipterus virgatus), known as threadfin bream or golden thread, is a demersal fish caught primarily in the South China Sea, Gulf of Thailand, and waters around Vietnam, Thailand, and Indonesia. It is the primary raw material for high-grade surimi, particularly for the Japanese market.
Why Itoyori Matters for Surimi
Surimi quality is determined by the gel strength of the myofibrillar proteins in the fish muscle. Itoyori has exceptionally high actomyosin content and low lipid levels, which translates to surimi with high gel strength — critical for kamaboko, chikuwa, and other traditional Japanese processed fish products.
Japanese buyers specify surimi by species and grade. Itoyori-based surimi commands a premium over Alaska pollock surimi in applications where gel strength determines texture — premium kamaboko, seafood sticks, and similar products.
Surimi Grades from Itoyori
Grade SA (Special A): Highest whiteness (>40 on Minolta scale), gel strength >700g·cm, minimal blood spots. Made from very fresh fish (≤12 hours from catch to processing). Price: $2.80–$3.60/kg (frozen block).
Grade A: Whiteness >35, gel strength >600g·cm. Standard premium grade for most Japanese food manufacturers.
Grade FA (First A): Slightly lower whiteness; acceptable for less color-critical applications.
Vietnam as a Sourcing Country
Vietnam catches significant volumes of itoyori in the South China Sea. Several processing facilities in the South (Bình Thuận, Kiên Giang, Cà Mau provinces) produce frozen surimi from fresh-caught itoyori for the Japanese and Korean markets.
Key advantage of Vietnamese itoyori surimi: proximity to fishing grounds allows shorter time-to-processing compared to imported raw material, which directly improves gel strength in the final product.
What Buyers Should Specify
When sourcing itoyori surimi, specify: (a) species — Nemipterus virgatus only, not mixed threadfin bream species; (b) grade; (c) gel strength measurement method (Japanese standard: fold test or rheometer); (d) surimi block weight (usually 10kg blocks); (e) storage temperature (-25°C for long-term, -18°C for short transit).
If you are evaluating Vietnamese itoyori surimi for the first time, I can arrange factory visits and comparative sample analysis with standard Japanese grades.
FAQ
What is itoyori surimi used for?
High-end surimi products where color and gel strength matter: crab sticks, kamaboko, chikuwa, and fish balls. Grade SA itoyori is the benchmark raw material for Japanese-style surimi processing.
What does grade SA mean in surimi?
Grades run roughly SA, A, AB downward, based on whiteness, gel strength, impurities, and moisture. SA is the top commercial grade under the Japanese standard, commanding the highest price.
Can you source itoyori surimi from Vietnam?
Yes — Vietnam is an established producer, with factories running Japanese-standard grading. I have arranged itoyori surimi shipments from verified Vietnamese processors; contact alan@viet.zone for current availability.
Sourcing itoyori surimi from Vietnam?
I work with international buyers on sourcing, supplier evaluation, and factory inspection. If you're evaluating Vietnamese suppliers for this category, I can help you avoid the common pitfalls.
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