Sir Keir and Sanae Takaichi discussed ways to strengthen ties between their two nations during the meeting, at the end of the UK prime minister's trip to East Asia.
Reductions in air pollution might sound like a positive thing. But scientists now say that reductions in East Asia are actually to blame for the sudden, rapid acceleration in global warming.
The total number of fatalities is 'most likely to be in the range 10,000-100,000', scientists have warned, citing the United States Geological Survey 'PAGER' forecast.
The world's safest countries have been revealed by Numbeo - with one of the smallest territories in Europe earning the top spot, following by nations in the Middle East and East Asia.