The highly contagious H5N8 virus was first detected in a bird in a pet shop on the Mediterranean island of Corsica in November before spreading to duck farms on the mainland in December.
Broiler chicken prices have fallen to 60 rupees ($0.8192) a kg from around 90 rupees a week ago.
The industry might see some temporary disruption, but we don't see this to be a long term phenomenon and this might correct itself in a period of 15-20 days.
All farms in Japan were earlier ordered to disinfect facilities and check hygiene regimes, and ensure that nets to keep out wild birds are installed properly, agriculture ministry officials told Reuters this week.
The government is calling for extra vigilance because of the growing number of infections in Japan and in Europe, which is in the grip of an outbreak. Japan has suspended poultry imports from seven countries, including Germany.
The flu was identified among 10,500 rearing turkeys at a farm in northern England, Defra said late Saturday, with all foul to be culled to prevent a spread.