Baba studied as part of the 33rd class of the Army War College, graduating in November 1921.

In July 1938, Baba was promoted to major general, and served as commanding officer of the IJA 3rd Cavalry Brigade to 1939.

[3] Baba was arrested in January 1947 on suspicion of involvement in war crimes and brought to Rabaul for trial.

Baba was charged with command responsibility for the Sandakan Death Marches, during which over 2,200 Australian and British prisoners of war perished.

[4][5] Evidence was presented at the trial that Baba was aware of the weakened condition of the prisoners, yet gave direct orders for the second march.