Pufferfish Cuisine Craftsman flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Tetrodotoxin stability

TTX is heat-stable, acid-stable, and water-soluble; ordinary cooking, freezing, and soaking do not reliably detoxify tissue, so toxic organs must be removed rather than cooked out.

TTX mechanism

Tetrodotoxin blocks voltage-gated sodium channels on nerve and muscle membranes, preventing depolarisation and causing ascending paralysis; there is no antidote and treatment is supportive.

Torafugu toxic organs

In Takifugu rubripes, the liver and ovary carry the highest toxin levels; muscle is generally low-risk but must still come from a licensed, eviscerated fish.

Lagocephalus risk

Lagocephalus species can carry tetrodotoxin in muscle and skin, not only viscera, and are not licensed fugu in most prefectures; they are a major misidentification hazard.

Species identification criteria

Fugu species are identified by dorsal, anal, and pectoral fin ray counts, skin prickle distribution, and body colour pattern; visual similarity between edible and toxic species drives misidentification risk.

TTX symptom onset

Symptoms typically begin 10–45 minutes after ingestion with lip and tongue paraesthesia, hypersalivation, ataxia, and ascending paralysis; early recognition is critical because deterioration can be rapid.

Fugu licence authority

The fugu handling licence is issued by the prefectural governor under the Food Sanitation Act; it is valid within the issuing prefecture and requires written and practical examination.

Licensed handler scope

A fugu licence covers a specific scope such as live fish handling, evisceration, or cooking; a cooking licence does not authorise evisceration of toxic organs.

Liver service rule

Most prefectural ordinances prohibit serving fugu liver; a few prefectures permit it under strict conditions, so the applicable ordinance must be checked before any liver dish is offered.

Licence display duty

Licensed handlers must register with the public health centre and display the licence at the place of business; unlicensed staff may not remove toxic organs.

Live fugu transport

Live fugu must travel in aerated tanks with controlled water temperature, in tanks dedicated to fugu, and never mixed with other species to prevent stress and cross-contamination.

Dressed fugu storage

Dressed fugu must be held at or below 4 °C and used within the prefectural time limit; frozen product must be stored at −18 °C or below with recorded temperatures.

Receiving checks

At receiving, staff verify species, the supplier's licence number, the processing certificate, and fish condition; these records support traceability and must be retained.

Cold storage separation

Fugu must be stored on dedicated shelves or in dedicated containers, separated from other foods, so that drip from fugu or its containers cannot contaminate other product.

Ice and melt water

Ice contacting fugu must be made from potable water and must not be reused for other foods; melt water must drain away from edible product to prevent contamination.

Evisceration sequence

Standard evisceration removes liver, ovary or testis, intestines, then skin; eyes and gills are removed and discarded as toxic or high-risk parts.

Gallbladder puncture

A punctured gallbladder contaminates surrounding muscle with bile and toxin risk; affected tissue must be trimmed and discarded, and the knife and board cleaned and disinfected.

Toxic waste containment

Removed organs go directly into a sealed, clearly labelled toxic-waste container, never onto the work surface, and are disposed of through a licensed contractor with a retained manifest.

Skin removal completeness

Skin must be removed completely, including prickles on species such as Takifugu pardalis; residual skin on fillets is a contamination risk and requires re-trimming.

Dedicated organ tools

Knives, boards, and gloves used on toxic organs are kept separate from those used on edible muscle and are cleaned and disinfected after each use.

Fugu sashimi slicing

Fugu sashimi is sliced approximately 1–2 mm thick from licensed, eviscerated muscle, held at or below 4 °C, and served immediately after slicing.

Fugu-nabe cooking

Fugu-nabe uses muscle and skin; the broth must reach a rolling boil and the fish must be cooked through, and raw fugu must not be added to a pot already in service.

Deep-fried fugu

Deep-fried fugu requires thorough cooking to an internal temperature of at least 75 °C; frying oil and batter must not be reused across species without filtration.

Yubiki skin preparation

Yubiki requires the skin to be fully cleaned of prickles, blanched in boiling water, chilled in ice water, and sliced; it is served as a separate skin dish.

Raw and cooked separation

Plating keeps raw and cooked fugu separate with dedicated utensils, and raw fugu must not contact other foods on the plate or in the pass.

Toxic-organ CCP

In a fugu HACCP plan, toxic-organ removal is a critical control point with a defined critical limit, monitoring method, corrective action, and verification record.

Colour-coded utensils

Colour-coded boards and knives, for example red for toxic organs and white for edible muscle, are a standard control to prevent cross-contamination during evisceration.

Hand and glove control

Handwashing and glove changes are required between handling toxic organs and edible muscle; gloves must not be reused, and the change must be reflected in monitoring records.

Surface disinfection

Work surfaces are cleaned and disinfected with an approved sanitiser after each evisceration, and cleaning records are retained as part of the prerequisite programme.

Traceability lot record

Each lot record links fugu to supplier, species, landing date, licence number, and processing date, and is retained for the period specified by the prefecture.

Suspected poisoning first steps

For suspected TTX poisoning, call emergency services (119 in Japan) and preserve remaining fish, organs, and vomit for toxicological analysis while notifying the public health centre.

Incident log contents

The incident log records symptom onset time, foods consumed, number of affected persons, and lot numbers, supporting the public health centre investigation and any recall.