The Canadian team (1-1), which is represented by skip Kevin Koe of Calgary, had a 5-2 lead on Japan's Yusuke Morozumi at the fifth end break before the shift in momentum.
In the sixth end, Koe flashed his first stone through the rings, allowing the Japanese team to pick up three points and tie the game at 5-5. Then in the tenth end, Koe's final Canadian stone hit a Japanese guard, allowing the Japanese team to steal their way to a victory.
The Japanese were able to bounce back nicely after losing their tournament opener by a score of 9-5 to Norway's Thomas Ulsrud.
Ulsrud and his team, who won the silver medal at the 2010 Olympic Winter Games in Vancouver, are best known for wearing funky pants on the ice.
This is the second straight year Japan has defeated Canada at the World Men's Curling Championship. In 2013 in Victoria, British Columbia, Morozumi defeated Canada's Brad Jacobs 10-8 in the round robin despite finishing 11th with a record of 3-8.