Japan (nationwide professional practice; MHLW (Ministry of Health, Labour and Welfare) regulations govern commercial raw fish service)
Anisakis simplex — a parasitic roundworm found in marine fish and squid — is the primary food safety concern in Japanese raw fish preparation, and understanding its prevention protocols is fundamental to professional and home sashimi preparation. The parasite completes part of its lifecycle in the flesh and organs of marine fish including mackerel, herring, salmon, squid, and other species. In Japan, the standard protocols for eliminating anisakis risk are: deep-freezing at -20°C for 24 hours minimum (or -15°C for 7 days), which kills larvae; and thorough visual inspection of fish flesh with a light table (transcandescence inspection) before butchering. Commercial sashimi operations in Japan use industrial freezing equipment that reaches -30°C to -40°C within hours for rapid kill. Salmon — one of the most anisakis-prone species — is never served raw unless it has been previously frozen to specifications in Japanese sushi restaurants. Farmed salmon (particularly Trout from Norway and Atlantic salmon) is considered lower risk because parasites require intermediate hosts not present in farm environments, but still typically frozen in Japan for safety. The most at-risk species for serving freshly-caught raw: mackerel, squid, horse mackerel (aji), and sardines. Vinegar curing (shimesaba) does not kill anisakis. Professional Japanese sashimi preparation requires skill in recognising larvae visually and responding correctly.
Food safety protocol rather than flavour technique — but directly enables the Japanese raw fish tradition by providing the safety framework that makes widespread sashimi consumption possible
{"Deep freezing at -20°C for 24+ hours kills anisakis larvae — the FDA-approved protocol for raw fish service","Visual inspection with light table (transcandescence): locate and remove any visible larvae before cutting","Salmon must be previously frozen for sashimi service — never freshly caught salmon served raw","Vinegar curing (shimesaba) does NOT kill anisakis — only freezing or thorough cooking","Farmed salmon has lower anisakis risk (no intermediate host in farm) but still typically frozen in Japan"}
{"For home sashimi: purchase fish that is explicitly labelled 'sashimi grade' (刺身用) — these have been frozen to specifications","Farmed trout from Norway (the basis for most Atlantic salmon sashimi globally) is low-risk but still should be frozen","Anisakiasis symptoms: severe stomach pain 1–12 hours after ingestion of infested raw fish — requires medical treatment","Professional kitchen light table setup: LED panel beneath translucent cutting board for transcandescence inspection"}
{"Assuming shimesaba vinegar cure kills anisakis — it does not; must be frozen or freshly cut with inspection","Serving freshly caught mackerel or squid raw without freezing protocol — highest anisakis risk species","Using a domestic freezer set at -18°C as equivalent to commercial -40°C deep freeze — domestic freezers do not reach required temperature quickly enough","Not performing visual inspection even on previously frozen fish — larvae may still be visible and removing is better practice"}
Japanese Cooking: A Simple Art — Shizuo Tsuji; Food Safety Protocols — Japanese Ministry of Health