On the first day of their spring training camp in Minamigo, Miyazaki, Seibu Lions 's first team practiced for the first time using the larger "unified base" that will be introduced in regular season this season.

After warming up, fielder we all did some base running to get a feel for it. defense Sosuke Genda infielder (32), who also practiced, explained, "It feels a little thinner and softer. The first time I saw the game, I was really impressed with the way it was played. stolen base The last WBC, he was called "Genda's one millimeter" because he got out runner of an attempted double steal by a fraction of a touch. runner The "1 millimeter" of Genda's touch is a little too close to the ball, but it doesn't change that much. I think I shouldn't worry about it." He emphasized that he will approach the new season without changing his style of play.

Major League Baseball will start using enlarged bases from 2023. The bases will be enlarged from the 15-inch (approximately 38.1 cm) square bases used in professional baseball last season to the MLB standard of 18-inch (approximately 45.7 cm) square bases, which will also shorten the distance between bases.