Wally Yonamine cards. Its from the 1953 Kobai Caramel "Red Square Corners" set (JF 18). The cards from this set are very similar to the JF 11 set also issued by Kobai Caramel which I wrote about here.
There are 27 known cards in the set, Yonamine is one of the "key" cards along with Dick Kishiwada, Tetsuharu Kawakami and Jun Hirota. Everyone played for the Giants, which is a problem with the Kobai Caramel cards in particular - they never put players from other teams in their sets (though other makers like Kawakami Caramel did).
So its not a set I'll ever try to collect but I do like having this in my Yonamine player collection!