Think about this:
At the time of the
Manchurian Strategic Offensive Operation, when the Soviet Red Army invaded Manchukuo, Inner Mongolia, Korea and Japanese-held islands in August 1945, the Kwantung Army's strength was at around 1,320,000 men, with one
armored division, 32 infantry divisions, six independent brigades, and up to 25 security battalions.
...
The remnants of the Kwantung Army either lay dead on the battlefield or were on their way to Soviet
prisoner-of-war camps. Over five hundred thousand
Japanese prisoners of war were sent to work in Soviet
labor camps in
Siberia,
Russian Far East and
Mongolia.