The war years were particularly difficult ones in Japan and many Japanese mathematicians failed to keep their research going through these difficult times. Shoda, however, managed to continue to undertake research and in 1946 he was elected the first Chairman of the Mathematical Society of Japan .
Ang mga digmaan taon ay mahirap lalo na sa mga bansang Hapon at maraming Japanese mathematicians nabigo upang mapanatili ang kanilang mga pananaliksik pagpunta sa pamamagitan ng mga mahihirap na beses. Shoda, gayunpaman, pinamamahalaang sa patuloy na magsagawa ng research at sa 1946 ay siya ang unang elected Chairman ng matematika Kapisanan ng bansang Hapon.