The government will tighten inspections of fishery products due to concerns about the effects of a radioactive leak from the crippled Fukushima nuclear plant in Japan.
Starting next month, the government will double the number of inspections of pollack, mackerel pike, tuna and shark. The intensified checks are likely to continue until the end of this year.
Six species of fish that are usually caught in the Pacific Ocean including plaice and pollack will also undergo tougher inspections twice a week.
The government will post the results on the websites of the fishery management service and the Maritime Affairs Ministry twice a week.