Kashima Antlers defensive midfielder Kaishu Sano has signed for Mainz on a four-year deal until 2028, the German Bundesliga club announced Wednesday. The 23-year-old, who joined Kashima last season and stood out with his abilities to win the ball and drive forward from deep midfield, made his Japan debut last November and was part of the Samurai Blue squad for the Asian Cup earlier in the year. “Mainz studied me thoroughly as a player and not only saw my strengths but also my potential to develop,” Sano said in a Mainz statement. “It’s always been my dream to play abroad, and the Bundesliga is…