WW2 Japanese Army Enlisted Collarless Tropical Shirt Dated 1941

This is a nice Japanese enlisted collarless traditionally worn under the tunic. When Japanese soldiers were assigned a work detail they often were allowed to remove their tunics and work in this shirt to avoid overheating. Some Japanese Soldiers actually discarded their canvas tunics and wore these in combat to avoid heat stroke in a humid jungle. These were also worn as extra insulation in China, Korea and Iwo Jima. This one is dated Showa 16 (1941).