He was born in 1924 so you'd expect that he'd spent some time in the military during the War. But I don't see anything about it in his Japanese Wikipedia article.
Here's some cards of him:
|1950 JCM118 "Transportation Back" menko|
|1967 Kabaya-Leaf #119|
|2006 BBM Nostalgic Baseball #024|
|2010 BBM Tigers 75th Anniversary #14|
|2011 Epoch/All Japan Baseball Foundation Managers #04|