Voice and subtitles both in Japanese.
 
eBaseball Professional Baseball Spirits 2021: Grand Slam features the latest player data for the 2021 baseball season. New players, new foreigners, and transfer players all appear in realistic graphics that faithfully reproduce their expressions, forms, gestures. The "Professional Spirits Shop" also includes a player awakening feature. And for the first time in the series, the game supports competitive and cooperative play for up to 4 players. Over 10 game modes are planned, including the new "Championship" mode, the "Grand Prix" mode in which you can lead your own team, and more.
More info.