About a dozen Japanese played in MLB last season, headlined by Ohtani and Yoshinobu Yamamoto of the World Series champion Los Angeles Dodgers. They came up through Nippon Professional Baseball and waited for free agency under the Japanese system, or were allowed to go earlier by their clubs.

No player in professional baseball history has slugged more home runs than the 868 that Oh hit over 22 seasons with the Yomiuri Giants, the Japanese equivalent of the New York Yankees. “He was almost like a figment of my imagination and like a folk hero,” Roberts said. “A fictional character.”

Last year’s World Series between the New York Yankees and the eventual champions, a Los Angeles Dodgers team led by Japanese phenom Shohei Ohtani, earned the best ratings in seven years. Just a year prior,