We have never before seen a card from this set. We are guessing that this is a game card, since "5 pts." is printed in Japanese on the front. The player depicted is Sakae Nakajima of Rikkio University in the Big Six University League. Mr. Nakajima was an outfielder, who is listed as a center fielder on this card. Our research indicates that he also played left and right field on occasion, but was primarily a center fielder in 1930. He was a right handed batter. He generally batted between .200 and .250, and he never hit a home run in Big Six play. He never played Japan Pro Baseball.
What an original design for a baseball card!
Size: 1 3/4" x 2 3/4"
Condition: Vg/Ex