The Japanese 15th Army was an army of the Imperial Japanese Army during World War II. It was involved in the invasion of Burma in December 1941 and served in that country for most of its war service.

The Japanese invasion of Burma was the opening phase of the Burma campaign in the South-East Asian theatre of World War II, which took place over four years from 1942 to 1945. During the first year of the campaign, the Japanese Army drove British Empire and Chinese forces out of Burma, then began the Japanese occupation of Burma and formed a nominally independent Burmese administrative government.