There is no money riding on the game between the United States and Japan, but the loser of the bet will have to wear a T-shirt of the winner's choice.
"It's a very exciting day for both of us," Gardenhire said. "Our women versus his women. Pretty neat."
The Twins skipper said he already had a shirt in mind for Nishioka.
"I wish I could trash talk in Japanese right now, 'cause he'd hear it all," Gardenhire said. "He's going to have to wear, 'I love American women.' I don't know what he's got for me."