Japan gained control over Korea, Malaysia, the Philippines, and Vietnam during world war II.
<u>Explanation:</u>
The Empire of Japan rose to be an expansionist power towards the 'end of the nineteenth century'.
It used its military might to expand its control over Korea, the Philippines, Malaysia, and Vietnam and even carried out mass genocides of the prisoners of war.
The Japanese Imperial Army was uncontrollable and it was only after the devastation of the Japanese cities of 'Hiroshima and Nagasaki' by the US Air force, the army finally surrendered.