Unlike the Greater East Asian Co-Prosperity Sphere, the Security and Prosperity Partnership of North America, also known as the North American Union or NAU, is designed to economically exploit the labor of poorer peoples, not their natural resources. Also, instead of torturing and slaughtering people already part of our empire the way Imperial Japan did, we'll continue to export our sadists and implements of genocide to the Middle East.
Oh, and we won't have a weak military either.
大西共栄圏へようこそ！
Get a haircut, you hippy.