I really do not know, but will comment that it does look to be possibly home made or school made. I have 2 thoughts.
In the early parts of WWII, many American soliders wore salvage WWI uniforms (including the famous Doughboy attire) and helmets as we did not have any ready to go at the time we went to war.
The helmet looks a lot like a Japanese helmet. I wonder if the fellow himself is Japanese?