Table 2. — Number of management units by size of water area in freshwater fish culture. 1%8. 



Source: Bureau of Statistics (l%9). 



Table 3. — Number and area of pond per fish farm, and average area of pond in each of the types. 



Source: Bureau of Statistics (1969). 



tables indicate that the fish farms in Japan are run on 

 a small scale. 



As shown in Table 4, private farms predominate in 

 fish culture in Japan. Most of them produce vegeta- 

 bles and crops as well as fish. The proportion of 

 farms engaging in monoculture is only 3% in carp 

 culture. 28% in eel culture, 109f in ayu culture, and 

 6% in rainbow trout culture. The increase of 

 monocultural fish farms will be desirable in the fu- 

 ture. On the other hand, the reduced demand for rice 

 may increase the culture offish as a sideline in the 

 rice producing area. 



As shown in Figure 1, carp culture farms are dis- 

 tributed from Hokkaido to Kyushu regions. Most eel 

 farms are centered in four prefectures: Shizuoka, 



Table 4. 



^"lassification of fish farms. 



Source: Bureau of Statistics (1969). 



Aichi. Mie. and Tokushima. They account for 

 78.6% of all eel culture farms. Ayu culture farms are 

 distributed in the southern part along the Pacific 



18 



