More than 100 cases of anisakiasis have been reported in Japan, caused by fish contaminated with parasites. Mackerel, bonito and sashimi are most likely the source. People experience reactions such as severe abdominal pain and vomiting after eating contaminated fish. Several supermarkets have stopped selling fish products and closed the markets for fresh fish.
Do not eat raw or undercooked fish. Raw fish is a common dish in Japan and infections with Anisakis parasites are known.