The Sanitation of Japan During the Early 19th Century, the Scarcity of Freshwater Within Japan During the 19th Century, How the Japanese Public Preserved Foods During the 19th Century, the Impact of Wasabi Upon Bacteria, the Concept of “Maguro” (Tuna) and the Reason Consumption of Raw Tuna Was Possible Throughout History Without Soap, and the Meaning of White and/or Glossy Eyes Upon a Fish

200 years ago, sanitary conditions were very poor in Japan. Very little clean water was available and refrigeration for fish did not exist. The Japanese used wasabi to stave off germs and food poisoning. Wasabi kills Escherichia coli and other bacteria instantly. Eating raw fish is referred to as "maguro" and was possible without modern soap and refrigeration because of wasabi. White eyes on a fish mean it's old, shiny eyes on a fish means its fresh...

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