Summary
From the above data, it would appear that both Japan and the U.S. are developed countries, implying stability and lower risk than developing countries such as Brazil, Russia, or Thailand. But in researching for interest rate data on Japan, the public data available, which includes the Economist and the Financial Times, indicate the interest rate spread on 10-year government bonds to be substantially different for Japan is the U.S., implying that Japan as much lower in risk.