Been a busy week - was traveling for work again and just had a lot going on - so I'm just going to show a random card this week. The January 1957 issue of Yakyu Shonen magazine (published in December of 1956) included baseball cards issued in panels of 10. Engel has labeled the set as JGA 134 "1956/57 Yakyu Shonen Dice Game" set. Here's the card of Yukio Shimabara of the Lions:
The panel on the bottom of the card lists the outcomes of dice rolls.
The backs of the cards showed images of Samurai warriors: