Chicken has been one of the most useful animals for life. They have been not only one of the most economical and adundant sources of valuable nutrients, but also the very good experimental animal to develop modern sciences. In Japan, eggs laid by the chickens have long been good sources of cash income for farmers and in many cases even for Samurais. Although nearly 50 millions of chickens were raised and they were of considerable importance in Japanese agricultre before the World War II, the industrialization or specializatin started after the War, Substantiallysince the 1960s. Among other spcies of poultry then chickens, ducks and Japanese quails are of some importane in Japan. Duck meat is often used in various cuisines at higher class restaurants and Japanese quail eggs are widely used. Hower those those species of commpared with chickens.