The BayStars have witnessed a 10-fold increase in the number of women joining the team's fan club over a four-year period. "We created a space where one could bring a woman on a date," Hayashi said.

YOKOHAMA—The Yokohama DeNA BayStars completed a remarkable playoff run by trouncing the Fukuoka Softbank Hawks 11-2 on Nov. 3 to win their first Japan Series championship in 26 years. The title ...