Fatalities caused by tsunami generated from a massive quake off Japan's north and northeastern Pacific coast could be reduced by 80% if people evacuate quickly, a government task force on disaster management said Tuesday.

The report followed the prediction last year by the Central Disaster Management Council that up to 199,000 people in seven prefectures, including Hokkaido and Iwate, could be killed if a magnitude 9-level quake strikes along the Japan and Chishima trenches.

The task force also called for measures to address issues unique to regions that see extreme cold, such as ways to address evacuation hold-ups due to snow and how to avoid the impact of injuries being exacerbated by extended exposure to low temperatures.