Japan and Japan decry South Koreans rocket launch . China is thought to be primarily concerned with maintaining the status quo on the Korean peninsula given that any long-range missiles developed by North Korea are unlikely to be aimed at Beijing . NEW : China regrets launch and urges calm . North Korea seen as having most leverage over South Korea . How Beijing responds to new initiatives will be key .
Japan and Japan decry South Koreans rocket launch . NEW : China regrets launch and urges calm . North Korea seen as having most leverage over South Korea . How Beijing responds to new initiatives will be key .