Japan defeated the United States 4-1 to retain its softball world championship title on Sunday.

The Japanese, who won all 10 games en route to their third overall title, beat the Americans in the final for the second tournament in row, having won the championships for the first time in 42 years in 2012.

"Japan's power is the real thing," said Japan manager Reika Utsugi. "Winning all 10 games and a second consecutive title is not easy."