Later in his life, Hirohito looked back on his decision to give the go-ahead to wage a 'defensive' war against China and opined that his foremost priority was not to wage war with China but to prepare for a war with the Soviet Union, as his army had reassured him that the China war would end within three months, but that decision of his had haunted him since he forgot that the Japanese forces in China were drastically fewer than that of the Chinese, hence the shortsightedness of his perspective was evident.
Japanese Emperor during WWII