Fish farming has increased in status equal to cattle farming as a source of food for mankind. In developing countries fish and shellfish provide inexpensive animal protein, while in developed countries aquaculture is expected to produce more fish and shellfish as a source of low-calorie protein for health conscious individuals. In such an era, knowledge of fish farming technologies of different countries, strongly influenced by cultural factors, is of valuable importance. The primary production techniques of fish farming in Japan described here have an emphasis on practical technology. This...