The native trouts on the other hand appear to be very suitable for this purpose. Prompted by this information, many prefectural trout hatcheries have carried out the experimental production of native trout fingerlings. Large-scale production will be realized in various parts of the country. As this occurs, demand for a variety of cultured fish will increase. In anticipation of this situation, various foreign species have been experimentally introduced into our country.
Examples are bluegill sunfish, whitefish, German carp, and channel catfish.
The freshwater cultured fish industry of Japan. Rep. 41, p. 57. Branchionephritis prevailed among eel populations in farm ponds in the winter of 1969-1970. In Bureau of Statistics, Japan statistical yearbook, p. 145-166. In Bureau of Statistics, Japan statistical yearbook, p. 160.