Political and business attention in the U.S. is focused on China's rapid and spectacular emergence as a global economic player. But the unfolding political drama surrounding Japanese Prime Minister Junichiro Koizumi's attempt to reform his country's antiquated financial system also contains some important lessons for the global economy.It's easy to see why interest in Japan has been eclipsed by that in China. With its economy growing by about 9% over the past year, China is galloping relative to Japan's slower growth of less than 2.5%. And many economists believe China's annual growth in gross domestic product could be 8% for...