What Is Seafood Traceability? How It Fights Origin Fraud and IUU Fishing

What Is Seafood Traceability?

Traceability refers to recording the path a product takes from raw material through processing, distribution, and sale so it can be tracked after the fact. For seafood, this centers on recording and passing along catch information — who caught the fish, when, where, and by what method. Unlike beef, which is tracked animal-by-animal with individual ID numbers, seafood is typically tied to information at the level of a "lot" — a batch from a single catch.

Three reasons traceability is needed

• Resource protection: if illegally or unreported-caught fish (IUU fishing) enters the market, catch-quota-based resource management stops functioning
• Consumer protection: shields consumers from origin fraud and false labeling, creating a market people can trust
• Human rights protection: international bodies have flagged forced labor and human trafficking in some IUU fishing operations, so tracing the source of a catch also helps improve labor conditions

In the West, the EU's IUU Regulation and the US Seafood Import Monitoring Program (SIMP) took the lead from the 2010s, requiring catch documentation for imported seafood. Japan built its own domestic system to keep pace with this trend — partly out of concern that failing to meet export-destination standards could shut Japanese seafood out of international markets.

Two directions traceability secures

Traceability has two directions: "trace-back" and "trace-forward." Trace-back means working backward from a product on the shelf to its source, used to investigate origin fraud or food-safety incidents. Trace-forward means anticipating which stores and regions a given catch will reach as it moves through the supply chain, which helps with fast recalls if a problem is discovered. Only when both directions function does traceability become truly effective.

Challenges unique to seafood

Compared with livestock and crops, securing traceability for seafood comes with distinctive challenges. Fishing vessels move across multiple fishing grounds during a single voyage, so one landing often mixes fish caught in different waters on different days — and unlike aquaculture, no one fully controls the growing environment. Because seafood must move quickly through distribution before freshness degrades, spending too much time on record-keeping creates a tension between freshness and accuracy. These factors make the design of seafood traceability systems more complex than for land-based foods.

On top of that, distant-water fishing often crosses multiple countries' exclusive economic zones (EEZs) and the high seas, making it complicated to determine which country's jurisdiction and regulations apply. Because more parties are involved in recording and passing along catch information than in coastal fishing, securing traceability for distant-water fishing is considered one of the most difficult areas of system design.

Japan's Fisheries Distribution Act and Catch Certification System

Japan's "Act on Ensuring the Proper Domestic Distribution of Specified Aquatic Animals and Plants" (commonly known as the Fisheries Distribution Act) took effect in December 2022. To prevent the distribution of illegally caught aquatic animals and plants, it requires businesses to pass along catch-number, species, quantity, and weight information to one another, and to create and retain transaction records. A distinctive feature is that it covers the entire supply chain — not just fishers, but wholesalers, processors, and import/export businesses as well.

Phased expansion of covered species

The system rests on two pillars. One is "domestic distribution compliance" — passing along and recording catch numbers and other information between domestic businesses. The other is "import/export compliance" — requiring documentation proving lawful capture to be attached at the time of import or export. Violations, following amendments to the Fisheries Act, carry severe penalties of up to three years' imprisonment or a fine of up to 30 million yen. This is paired with administrative measures such as seizure of illegally caught goods and suspension of trading, designed to strengthen the economic deterrent.

Practical obligations for fishers and businesses

When fishers land a covered species, they must issue a "catch number" and record it on the shipping slip. The distribution business that receives that number must carry it forward — even when the product's form changes through processing or repackaging — and pass it on to the next party in the chain. Transaction records must be retained for a set period so they can be verified during government inspections. For small-scale fishers and independent shops, the added administrative burden — moving from paper slips to dedicated systems — has been flagged as a challenge.

Importers face additional requirements. They must attach documentation such as a "certificate of lawful catch" issued by the exporting country's government, proving the catch was lawfully taken; cargo lacking proper documentation cannot clear customs. This effectively makes it difficult to import from origins where the exporting country lacks a traceability system, indirectly encouraging those countries to build up their own systems.

The path to creating the system

The Fisheries Distribution Act grew out of a long-running problem: poaching of abalone and sea cucumber. Sea cucumber in particular, traded as a high-end food item, saw a surge in poaching driven by rising export demand to China, and Diet sessions repeatedly raised concerns that this was funding organized crime. Until then, poaching had mainly been policed through prefecture-by-prefecture fishing coordination rules, but these had limits when it came to wide-area smuggling routes crossing prefectural borders. After debate concluded that national-level distribution regulation was needed, the law was enacted in 2020 and took effect in December 2022.

What Is IUU Fishing, and How Serious Is It Globally?

IUU stands for Illegal, Unreported, and Unregulated fishing — a catch-all term for operating without a country's permission, falsifying catch reports, and unregulated fishing on the high seas beyond any jurisdiction's reach. We cover the full picture in What Is IUU Fishing? The Reality of Illegal Fishing Stealing 26 Million Tons of Fish a Year, Satellite Monitoring, and Regulation; here, we focus specifically on its relationship to traceability.

Scale and economic loss

Research estimates suggest IUU fishing accounts for 13–31% of the world's catch, with economic losses estimated at up to $23 billion a year. In regions with weak governance, such as parts of coastal West Africa, IUU fishing is said to account for more than 40% of the catch. The losses extend well beyond lost income for fishers — they include unfair price competition against legitimately operating businesses and lost tax revenue for coastal states.

How traceability prevents IUU fishing

Fish sourced from IUU fishing is characterized by catch records that are missing or falsified. If importing countries require a "catch certificate" to be attached and allow catch numbers to be cross-checked at every stage of domestic distribution, fish of unknown origin becomes far harder to slip into the legitimate market. The EU has banned imports of seafood lacking catch certificates under its IUU Regulation since 2010, and the US has required data entry for 13 species groups under SIMP since 2018. Japan's Fisheries Distribution Act was built to follow this same international framework.

Risks specific to the Japanese market

Japan is one of the world's largest seafood importers, and depending on the fisheries management systems of the countries and regions it imports from, it has repeatedly been flagged as being at risk of unintentionally bringing in IUU-sourced seafood. International environmental NGOs have repeatedly noted that a certain share of seafood flowing into the Japanese market is likely linked to high-IUU-risk fishing, which is part of the backdrop driving calls to strengthen import controls under the Fisheries Distribution Act.

The link between IUU fishing and human rights

IUU fishing isn't only a resource-management issue — it's deeply tied to the working conditions of crew members. The International Labour Organization (ILO) and human-rights groups have reported serious abuses on some distant-water vessels, including long working hours, unpaid wages, and forced labor. Vessels with opaque catch information also tend to be harder to verify from the outside when it comes to labor conditions, so strengthening traceability is expected to serve not only as resource protection but also as a safety net for the human rights of fishing crews.

IUU fishing near Japan's own waters

IUU fishing isn't just a distant-water problem. Japan's Coast Guard and Fisheries Agency continue to confirm illegal operations by foreign vessels near Japan, including unauthorized fishing within Japan's exclusive economic zone (EEZ). In recent years, illegal operations by foreign vessels around the Yamatotai area of the Sea of Japan have become a recurring issue, prompting repeated warnings and seizures by enforcement vessels. Strengthening domestic traceability systems also matters for reducing the risk that catches from this kind of illegal operation slip into the domestic market.

How Does Origin Fraud Actually Happen?

A lack of traceability isn't just a resource-management problem — it also amounts to direct deception of consumers. Japan's Food Labeling Act requires origin labeling on seafood, yet violations continue to be reported.

Real enforcement cases

• A case in which Mexican bluefin tuna was printed on purchase slips as "farm-raised bluefin, Nagasaki," misleadingly implying a Nagasaki origin (a corrective-instruction case from Japan's Ministry of Agriculture, Forestry and Fisheries and Consumer Affairs Agency)
• A case in which frozen bigeye tuna from China was falsely labeled as originating from Taiwan
• Shellfish rules allow the location of short-term "fattening" (culturing) to be labeled as the place of origin, a structural quirk that has been flagged for creating labels that diverge from the actual catch location

Selling food with a false origin label in violation of food labeling standards carries a penalty under the Food Labeling Act of up to two years' imprisonment or a fine of up to 2 million yen. However, most violations are discovered only after the product has already reached the market — many cases could likely have been prevented, or caught earlier, with a properly functioning traceability system.

Structural factors behind fraud

Origin fraud doesn't stem only from isolated bad actors — it also arises from structural factors like price gaps, supply-demand imbalances, and the complexity of labeling rules. The larger the price gap between domestic and imported fish of a given species, the stronger the incentive to mislabel, and when fish from multiple origins are purchased and blended during processing, label accuracy tends to erode. Products that pass through more processing steps along the way — such as culturing or pre-slaughter handling — also tend to have more ambiguity about which stage's information should count as the "origin."

Government monitoring systems

Proper origin labeling is jointly monitored and enforced by Japan's Consumer Affairs Agency and Ministry of Agriculture, Forestry and Fisheries. Regional agricultural administration offices under the ministry conduct regular inspection rounds at supermarkets and retailers, requesting explanations from businesses when labeling appears questionable. In serious cases, businesses first receive a private "instruction" to improve without their name being disclosed; if improvement doesn't follow, or if the fraud is clearly intentional, an "order" is issued and the business's name is made public. Even so, these inspections only sample a small fraction of overall distribution volume, so an automated, traceability-based cross-checking system is seen as a necessary complement to improve the system's real-world effectiveness.

Blind spots in restaurants and processed foods

Unlike a fresh fillet at the supermarket, restaurant menus and processed foods (fish cakes, fried products, canned goods, etc.) sometimes carry only limited origin-labeling obligations, making it structurally harder for consumers to verify origin. When fish from multiple origins are blended during processing, accurately tracking what proportion came from which origin becomes technically difficult. These "hard-to-see routes" are exactly the areas where digital traceability is seen as having the greatest potential impact.

How Digital Technology Is Changing Seafood Tracking

Paper-based record-keeping and transmission has limits — recording errors, tampering risk, and the hassle of storage and retrieval — so demonstrations of digital traceability technology have been advancing in Japan and abroad in recent years. QR codes, RFID tags, cloud-based recording systems, and blockchain are all starting to be used, often in combination.

Proving origin with blockchain

In 2020, a seafood business in Ishinomaki, Miyagi Prefecture, ran a pilot project using blockchain technology to build a traceability system proving the origin and freshness of sea squirt (hoya). The system lets consumers check supply-chain records — landing date, fisher information, and more — from a terminal in-store or on their smartphone. Blockchain's key trait is that its records are extremely difficult to tamper with, which makes it well suited to fighting origin fraud. Similar projects are underway both in Japan and abroad, such as "Ocean to Table," which aims to connect fishers to consumers via blockchain in order to reduce overfishing and opaque trading.

The Fisheries Agency's digitalization efforts

Japan's Fisheries Agency has published model case studies, under its "Fisheries Value Chain Building" initiative, of digitizing transaction records at local fish markets and export certification documents. Compared with the traditional approach of mailing or faxing paper certificates, digitalization is expected to enable both real-time record sharing and stronger tamper resistance. That said, some local markets and small businesses still lack the digital equipment and internet infrastructure to keep up, so nationwide digitalization is expected to take more time.

The cost and challenges of adopting technology

While the benefits of digitalization are significant, the cost of introducing and running new systems can be a burden for fishers and small-to-midsize distribution businesses. Government support for adoption and shared platforms built by industry associations are likely to shape how quickly these technologies spread. Blockchain in particular offers strong tamper resistance but requires specialized knowledge and cost to build and maintain, making it a high hurdle for local fishery cooperatives or small processors to adopt on their own. Efforts are underway in various regions to build shared infrastructure through partnerships among government, universities, and IT companies, lowering the barrier to participation.

Combining AI and satellite technology

Traceability isn't limited to passing along records — it's increasingly being combined with technology that monitors fishing grounds themselves. Using AI to analyze satellite imagery and data from AIS (automatic identification system) vessel-tracking devices to detect suspicious operating patterns — such as prolonged stops outside authorized fishing zones — is said to have produced measurable results in deterring IUU fishing. We cover satellite monitoring in more detail in What Is IUU Fishing? The Reality of Illegal Fishing Stealing 26 Million Tons of Fish a Year, Satellite Monitoring, and Regulation. Combining "monitoring at the fishing ground" with "traceability at the distribution stage" is expected to further narrow the gap through which illegal catches can enter the market.

One remaining challenge is that fishing-ground monitoring and distribution-stage records are often kept in separate databases — so even when illegal operations are detected, it can be impossible to trace which distribution route the resulting catch actually followed. If satellite monitoring data and catch-certification databases were linked in the future, automatically flagging the catches of suspect vessels, it could connect monitoring and distribution regulation into a single, unbroken chain.

Eco-Labeling Systems Worldwide and Adoption in Japan

Beyond the traceability record itself, seafood eco-labels let consumers judge at a glance whether a product was caught or farmed sustainably. The best known are MSC (for wild-caught seafood) and ASC (for farmed seafood); we cover both in detail in What Is the MSC Blue Fish Label? How to Spot Sustainable Seafood at the Supermarket and What Is ASC-Certified Aquaculture? A Neutral Guide to Choosing Salmon, Oysters, and Yellowtail.

The process of getting certified

Both MSC and ASC use a two-stage structure: a primary certification (fishery or aquaculture certification), in which the fishery or farm itself is assessed against criteria such as resource management, environmental impact, and traceability, and a secondary certification — Chain of Custody (CoC) certification — in which processors and distributors are assessed on keeping certified seafood separate from uncertified product. A product only earns the right to display an MSC or ASC label after passing through both stages. Assessments are conducted by third-party bodies and require periodic renewal, which underpins the credibility of the certification.

Because CoC certification itself requires creating lot-by-lot inbound and outbound records and physically separating certified from uncertified seafood at every stage of storage and processing, a product carrying the MSC or ASC label is, in effect, a working example of traceability in practice. The flip side is that the bar for certification includes not just a fishery's or farm's resource-management capability but also a business's record-keeping and management systems — one reason certification can be a hurdle for small and midsize operators.

Adoption status in Japan

While certification numbers are steadily climbing, eco-labeled products are still less common on Japanese supermarket shelves than in Europe. Certification and its upkeep involve real costs, which tend to be passed on in price, and consumer awareness remains a work in progress. In recent years, more businesses handling tuna and skipjack have pursued certification, with major seafood companies eyeing export markets leading the way.

Trustworthy signals beyond certification marks

Beyond international certifications like MSC and ASC, more Japanese seafood companies are publishing their own sustainable-sourcing policies, disclosing which species they handle and where they source them. Examples include major seafood companies that continuously survey the sustainability of hundreds of species and set improvement targets with deadlines, and major retailers expanding MSC/ASC-certified products under their private-label brands. Even without a certification mark, a company that publishes its sourcing policy and supplier fishery information on its website offers consumers another useful signal.

What Consumers Can Do Starting Today

Beyond waiting for systems and technology to catch up, individual consumer choices are also a force that can shift the market. The more that certified, traceable products get chosen, the stronger the incentive for businesses to keep investing in these efforts.

1. Check the package for certification marks such as MSC or ASC
2. Get in the habit of checking origin and fishing-method labels (such as set-net or purse-seine) at the fresh fish counter
3. Choose fishmongers and restaurants that actively disclose sourcing and fisher information
4. For unusually cheap imported seafood, stay alert to whether it has gone through proper catch certification
5. Choose fish that are in season and avoid over-concentrating on a few origins, to spread fishing pressure across different stocks

Efforts in restaurants and school meal programs

Beyond choices individuals make, sourcing policies at restaurant chains and school meal programs also shape the market as a whole. Airlines adopting MSC/ASC-certified seafood for in-flight meals, and major restaurant chains doing the same, are drawing attention as a way to expand sustainable sourcing even in settings where consumers rarely choose directly.

Don't forget underutilized fish and domestic products

When people think about choosing sustainable seafood, they tend to focus on certification marks on imported products, but actively eating "underutilized fish" — catch that's off-spec and rarely reaches the market — is also an effective way to reduce waste of the resource. Making full use of what's caught tends to favor domestic, local fish with shorter transport distances, which in turn simplifies the distribution route and makes traceability easier to secure. More municipalities and businesses are actively incorporating underutilized fish into school meal programs and as hometown-tax-donation gifts.

Buying direct from producers and local markets

Buying at direct-sale outlets attached to fishing ports, or through online shops run directly by fishers, is another effective option from a traceability standpoint. The fewer intermediary steps in distribution, the more directly information about origin, fishing method, and landing date flows from the fisher, structurally shrinking the risk of fraud. Stopping at a direct-sale outlet while traveling or visiting family, or using an online store run by a local fishing cooperative, are simple ways to choose seafood with a visible producer behind it.

In recent years, more municipalities have offered hometown-tax-donation gifts that name the fisher and landing port, and choosing these is another way to indirectly support seafood with a visible producer. It's worth knowing as an option that lets you support local fisheries while enjoying fish with secured traceability.

Traceability Systems Abroad and Where Japan Stands

The design of seafood traceability systems varies by country and region — in scope and in strictness. To understand where Japan's Fisheries Distribution Act stands, let's compare the systems of major importing countries and regions.

Comparing the EU, US, and Japan

Where the EU and the US placed "all imported seafood, or a broad range of species" under regulation from the outset, Japan has taken a phased approach, starting with species carrying the highest risk of poaching or stock depletion. This difference reflects the fact that Japan, while a major seafood consumer heavily dependent on imports, has proceeded cautiously to gauge the impact a sudden system rollout would have on businesses at home and abroad.

International standards that affect Japan's exports too

Traceability systems don't just function as import controls — they also matter when Japan exports seafood. Businesses exporting to the EU or the US are required to submit catch certificates meeting the destination country's standards, which means building up domestic traceability is an unavoidable task for Japan's fishing industry as it seeks to grow exports.

Moves across Asia

Asian countries with strong seafood trade ties to Japan — South Korea, Thailand, Indonesia, and others — are also increasingly building out their own traceability systems in response to tightening EU and US regulations. Southeast Asia in particular is a major global seafood-exporting region, but it has also faced international criticism over opaque labor conditions and catch reporting in distant-water fishing, and system-building there has largely proceeded in response to demands from export markets. For Japan too, the state of trading partners' systems directly affects the transparency of the seafood entering the domestic market.

Thailand, for example, received a "yellow card" warning from the EU in 2015 over shortcomings in its IUU fishing countermeasures. That triggered a rapid push to strengthen vessel registration and labor-condition oversight, and the card was later lifted. Cases like this show that an importing country's system can push an exporting country to improve its fisheries governance — and it raises the question of what influence Japan's Fisheries Distribution Act might eventually have on the systems of its trading partners.

Remaining Challenges and the Road Ahead

The Fisheries Distribution Act still covers only a limited set of species — abalone, sea cucumber, and glass eel among them — and has yet to reach the full range of seafood distributed in Japan. Coverage will expand when the amended law takes effect in April 2026, but this remains a phased expansion compared with the broader scope adopted by other countries.

Key issues going forward

• Balancing further expansion of covered species with reducing the practical burden on small and midsize fishers and distributors
• Standardizing digital records (differing systems across businesses increase the burden of cross-checking)
• Expanding disclosure to consumers (broadening mechanisms, such as QR codes, that let ordinary consumers access catch information directly)
• Mutual recognition with international catch-certification systems (reducing duplicate import/export procedures)

The importance of international cooperation

Because IUU fishing crosses borders, no single country's system alone can fully address it. If major importing countries — the EU, the US, Japan, and others — align their catch-certification standards and make it possible to cross-check information with one another, the loopholes are expected to shrink. International organizations and environmental NGOs also play a role in verifying how effective each country's system is in practice and pushing for improvement.

Being mindful of small-scale fishers

In debates over strengthening the system, striking a balance between rigor — preventing poaching and mislabeling — and reducing the burden on legitimately operating small-scale fishers is also an important issue. Requiring the same level of digital record-keeping from small coastal fishers as from large corporations risks accelerating business closures and the shortage of successors. Government support for record-keeping, and the provision of simplified recording systems that multiple fishers can share, are being discussed as ways to scale system operation to fit the size of the business.

Japan's fishing workforce continues to age and shrink, and the capacity to adapt to new systems varies by region and generation. Making traceability truly effective requires not just deterrence through penalties but also building mechanisms that let fishers on the ground participate without undue strain. Going forward, tools such as easy-to-use smartphone apps and systems where fishing cooperatives handle record-keeping on fishers' behalf are expected to spread further, reducing the burden at the front line.

Traceability isn't something you build once and forget — it works only when businesses, government, and consumers keep checking and using the information. Only when the three gears of regulation, technology, and consumer awareness mesh together does the room for illegal catches and fraudulent labeling to slip through start to shrink. The next time you choose a fish, pausing to look at the label on the package is a small step that helps support a sustainable fishing industry.