Rob's Japanese Cards, has this to say about him:
After leading the league with 20 homers in his rookie season, he went on to win three batting titles, and three home-run crowns. He held the record for most hits in a game (7), and his .383 BA in 1951 remained the single-season record until Isao Harimoto topped it by .0003 in 1971. He was named to eight Best Nine teams. His best season for the Lions came in 1954 when he won the MVP Award, hitting .321 with 22 homers, 88 RBI and 11 stolen bases. He also won the 1957 Japan Series MVP award.
Jerry, who used to live in the house next door to me, had a pen pal in Japan just after World War II - which is how I came to have this card. They are hard to come by.