Dai Nippon teikoku shugi The Great Japanese Imperialism
Shuku Kōgun Banzai Celebration the Imperial Army Banzai
I have some doubt if it's an authentic WW窶｡U flag. "Dai Nippon teikoku shugi" the Great Japanese Imperialism looks rather odd as a slogan on a flag. "Dai Nippon teikoku" without "shugi", meaning the Great Japanese Empire, is quite common, though.
Ok- Thank you so much for the quick reply. I have pictures w/ the relative (Tank Battalion) in 1944 or 1945 in the Phillipines w/ the flag & it was stored w/ his dress jacket- so it's definitely legit time wise... not sure on the actual writing of course. Anyway- thank you again, I sincerely appreciate the help.