TOKYO (MarketWatch) -- Japan won't accept China's proposal to hold an emergency meeting of the heads of delegations to the six-party talks on North Korea's nuclear programs, Japan's Chief Cabinet Secretary Yoshito Sengoku said Monday, according to Kyodo News. Sengoku told a news conference that Japan is now focusing on working closely with the U.S. and South Korea to address rising tensions on the Korean Peninsula following last week's deadly incident on a South Korean island.