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Japan's commercial aquaculture production has developed rapidly since the Second World War, and now it occupies an important position in the fisheries sector. Aquaculture production in 2003 is estimated to 1,301,437 tons, worth $4,199million, accounting for 22% of the total output of the National Fisheries in Japan, 31% of the country's total output value. Sea water aquaculture accounted for 96% of the total aquaculture production, accounting for 90% of the national total output value.

Inland fisheries production is low, in addition to objective reasons, also related to the Japanese living habits, most Japanese are not interested in other freshwater fish expect anguilla japonica, many Japanese never tried such expensive cyprinus carpio, crucian carp, oincorhynchus mykiss and so on. In terms of resource conditions and the existing technical level, the Japanese inland aquaculture production should be far more than 90-100 thousands tons, but the market demand has restricted the development---overproduction, prices fall, end of all the producer is affected by the loss. The main types of inland fisheries production are: anguilla japonica, cyprinus carpio, crucian, oncorhynchus mykiss, plecoglossus altivelis etc.

Mainly for หนังเอวีจีน fish, and extensive aquaculture for shellfish and seaweed. Until around 1960, natural seawater ponds and inlets surrounded by embankments or nets were widely utilized for extensive aquaculture. However, in recent years, this practice has only been applied to kuruma prawns and a few other fish and shellfish species.

Japanese eel farming technology and fish feed formulation is more advanced and nutritional, more intensive farming, plastic greenhouse can automatically add water and control temperature, the production level is higher, and the general yield is 15-20 tons per acre. Eel are distributed around the country in Japan, but many places is kept neither raising carp nor eating carp, carp aquaculture is conducted in five Japanese prefectures--Ibaraki , Gunma, Fukushima, Fukuoka, Nagano. Its production accounts for over 75% of the total output of common carp, the main way to cultivate are net cage culture and recirculating aquaculture,but seed rising is used the still water pond, feeding density and feeding management technology is generally consistent with the technology we are now using, adult fish pond is general 50-100 square meters, average yield is about 50 kilograms per square meters.

Advantages:

Japan has great advantages in the development of commercial aquaculture:

1.Island, there is a rich fish culture, mainly to eat fish feed produced by fish feed machine

2.Shoreline twists and turns with a lot of excellent harbors

3.Have a strong team of ocean catch floods



4.A current advantage can be formed the rich bait near, and a large fishing ground of Hokkaido fishing ground

5.Nature: Kuril cold current and Japanese warm current come together in the sea area near Hokkaido, this natural environment makes the sea water disturbance, the seawater that have been thrown take the nutrient salts to sea surface, making the plankton flourish, so as provide abundant bait for fish,rich the fishery resources. so the world's first major fishing grounds comes into being---Hokkaido fishing ground.

6.Society: Japan is not only developing the offshore fishery, but also expanding coastal aquaculture, the developed shipbuilding industry make Japanese have a powerful fleet to deep-sea fishing, Japan fishing is ranked first in the world, and fish play an important role in Japanese food.








For better development of Japan aquaculture, it is necessary for fish farmers to produce fish feed with professional fish feed extruder by own because of the high cost.